PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteSome links on this page are affiliate links: if you buy through them we may earn a commission, at no extra cost to you.
Choose backup storage by asking how quickly you must recover, whether your internet connection is dependable, how many devices need protection, and how much hardware you want to manage. An encrypted external drive is usually the simplest and fastest local option; a NAS centralizes backups for several computers; cloud backup provides convenient off-site protection with little local maintenance. None is sufficient by itself for important data. Build a 3-2-1 arrangement—three total copies, two storage types on separate devices, and one copy kept away from your primary location—then test that you can actually restore files.
What does the 3-2-1 backup rule require?
The 3-2-1 rule is the baseline for choosing among an external drive, NAS, and cloud service. The UK Department for Education Cyber Security Hub defines it as three copies of your data (one primary and two backups), on two different forms of storage and at least two separate devices, with one backup kept off-site.
As an Amazon Associate I earn from qualifying purchases.
Free tools Windows power users keep installed
One-click scans. No signup required.
This arrangement addresses different failure modes rather than simply creating duplicates. A second folder on the same computer can be destroyed by disk failure or malware; two disks in one room can be lost to theft, fire, or flooding; and a continuously connected backup can be encrypted by ransomware. Combining local and off-site copies gives you a fast recovery path and a disaster-recovery path.
Why one device or location is not enough
- Hardware failure: Drives wear out without warning, and a backup device can fail while it is being used for recovery.
- Ransomware or accidental deletion: Malware and synchronized deletions can affect every online copy that has write access.
- Local disasters: Theft, fire, water damage, or a power event can remove both your computer and a nearby backup.
- Operational mistakes: A backup that was never scheduled, completed, or tested is not a dependable recovery plan.
CISA advises frequent backups to reduce the risk of permanent data loss. The practical implication is to design for independent copies, isolation, and a restore procedure—not just to purchase more storage.
#1 Best Overall
- Easily store and access 2TB to content on the go with the Seagate Portable Drive, a USB external hard drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
How do external drives, NAS, and cloud backup compare?
Each medium solves a different part of the recovery problem. Use this table to identify the trade-off that matters most to you.
| Criterion | External drive | NAS | Cloud backup |
|---|---|---|---|
| Initial cost | One-time purchase of a drive; capacity determines the price. | Enclosure plus one or more drives; higher upfront investment. | Usually little or no hardware purchase, depending on the service. |
| Ongoing cost | Usually none, aside from replacement drives and storage rotation. | Drive replacement, electricity, and occasional maintenance. | Recurring subscription or usage charge; terms vary by provider. |
| Recovery speed | Fast for local files, limited by the drive and connection. | Fast on the local network when the NAS is available. | Limited by internet download speed and provider availability. |
| Internet dependence | None for local backup and restore. | None inside the home or office; remote access needs a connection. | Required for upload, browsing, and restore. |
| Large-file workload | Well suited to large photo and video libraries. | Well suited to shared, large collections over a network. | Uploading and restoring many large files can take substantial time. |
| Multiple devices | Usually one device at a time unless manually moved. | Central target for several computers and users. | Access from many devices, subject to account and service limits. |
| Automation and administration | Simple after scheduling, but you must connect and disconnect it. | Highly automatable, with more configuration and maintenance. | Usually the least local hardware administration; account settings remain important. |
| Ransomware isolation | Good when disconnected while idle; poor if left attached. | Online by design, so permissions and snapshots matter. | Depends on immutable history, retention, and account security. |
| Off-site resilience | Requires rotating or storing a second drive elsewhere. | Requires another location, external destination, or cloud replication. | Provided by the service’s separate data centers, subject to its controls. |
| Privacy and trust | You control the device and keys, but must secure and store it. | You control the appliance, accounts, and physical location. | You trust the provider’s security, retention, and availability practices. |
When is an external drive the best choice?
Choose an external hard drive when you need a low-complexity local backup, have unreliable or metered internet, store many large files, or want the fastest recovery from a nearby copy. It is often the right starting point for a single computer or a modest household setup.
How to set up an external-drive backup
- Size the drive for growth. Start with the data you need to protect, then leave room for future photos, videos, projects, and backup history. A drive that is already nearly full will force premature replacement or deletion of older versions.
- Encrypt the drive. Use the operating system’s full-disk or volume-encryption feature and store the recovery key separately from the drive. Without the key, a lost drive can expose sensitive files; with no copy of the key, you may be unable to restore.
- Choose backup software with scheduling and version history. Configure it to run automatically rather than relying on memory. Include system settings or a recovery image if you need to rebuild the computer, not only personal documents.
- Run the first backup while connected directly. The initial copy can be large; keep the computer powered and verify that the job completes without skipped folders or errors.
- Disconnect when the job finishes. CISA and the UK National Cyber Security Centre warn that a removable drive left attached can be reached by ransomware. Eject it properly, unplug it, and reconnect only for the next scheduled backup or a restore.
- Store it safely. Protect it from heat, moisture, impact, and unauthorized access. If it is your only backup, it is still vulnerable to a local disaster, so plan a second copy in another location.
How to make a removable drive an off-site copy
Use two drives in rotation. Connect drive A for a scheduled backup, disconnect it, and keep it away from the computer. Periodically bring drive B to the same location, update it, and move it back off-site. The rotation means one drive is available for a quick local restore while the other remains isolated from a local incident or malware outbreak.
External-drive pitfalls and fixes
- It is always plugged in: Change the workflow so the drive is offline between backup sessions; an always-connected disk is not an isolated copy.
- The backup fills the disk: Increase capacity or set a documented retention policy that preserves enough historical versions to recover from delayed discovery of corruption.
- The drive is lost or stolen: Encrypt it, keep the recovery key separately, and maintain another copy in a different location.
- A restore is slow or incomplete: Test representative files and a full recovery path before you need them; investigate permissions, damaged sectors, or missing application data.
When does a NAS make sense?
A network-attached storage (NAS) appliance is useful when several computers need a shared, centrally administered backup target. It can automate jobs over the local network and may offer snapshots, replication, and multiple backup applications, but it remains an online computer and is not automatically an independent backup.
Rank #2
- Easily store and access 5TB of content on the go with the Seagate portable drive, a USB external hard Drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
What a NAS can improve
- Centralization: One protected location can receive backups from household PCs, workstations, and selected mobile devices.
- Automation: Scheduled jobs reduce the chance that someone forgets to connect a drive.
- Local access: Restores within the same network avoid uploading large files to the internet.
- History and recovery features: Snapshots or versioned jobs can roll back accidental changes when configured and retained correctly.
Why RAID is not a backup
RAID can keep a NAS available when a drive fails, but it does not create an independent historical or off-site copy. A NAS can still be damaged by ransomware, administrator error, controller failure, theft, fire, or a second drive failure during rebuild. Synology’s guidance describes tools such as Hyper Backup, Snapshot Replication, USB Copy, Active Backup, and Cloud Sync as components that can be combined in a 3-2-1 design; the array itself is only one part.
How to deploy a NAS safely
- Place it on a trusted network. Update its operating system and applications before importing data, and avoid exposing its administration interface directly to the public internet.
- Create separate accounts. Use a unique administrator credential, enable multi-factor authentication where available, and give each user only the permissions required for backup or restore.
- Configure backup jobs and retention. Include every computer that needs protection, choose schedules that fit working hours, and retain versions long enough to discover silent corruption or delayed ransomware encryption.
- Enable snapshots or equivalent history. Treat these as a fast recovery layer, not as your off-site copy. Confirm that protected versions cannot be deleted by an ordinary user account.
- Add an independent destination. Replicate selected data to a rotated external drive, a second NAS in another location, or a vetted cloud service.
- Test restores from both layers. Recover individual files and a complete machine or service so you know which credentials, applications, and configuration are required.
NAS failure modes
- Ransomware reaches the share: Restrict write permissions, keep another destination offline or separately credentialed, and use snapshots with retention.
- The NAS is stolen or destroyed: Maintain an off-site destination; a second copy in the same room does not solve this scenario.
- Remote access is exposed: Disable unnecessary internet-facing services, apply updates, and require strong authentication for every administrative account.
- Drive failure during rebuild: Keep an independent backup because RAID recovery is not guaranteed and may stress remaining drives.
When is cloud backup the right option?
Cloud backup fits people who travel, need access from multiple locations, or do not want to maintain local hardware. It supplies geographic separation and usually handles storage infrastructure for you, but every upload and restore depends on an internet connection and the provider’s availability.
What to check before choosing a cloud service
- Encryption: Confirm encryption in transit and at rest, and understand whether you can control the encryption key.
- Strong account security: Require multi-factor authentication or two-step verification, use a unique password, and protect recovery codes.
- Version history and deletion recovery: Verify how long deleted or overwritten files remain recoverable and whether retention can be changed by an administrator.
- Restore process: Read the instructions for downloading individual files and rebuilding a complete computer. A service that only synchronizes folders may not provide system recovery.
- Bandwidth and limits: Estimate the first upload and a worst-case restore over your actual connection, including any data caps.
- Provider transparency: Review where data is stored, service availability commitments, account-recovery procedures, and how termination or export works.
Cloud sync is not automatically backup
A synchronized folder mirrors changes across devices. If a file is deleted or encrypted and the change is synchronized, every connected copy may reflect the damage. Select a service with independent versioning, deletion recovery, and a documented retention policy, then perform a restore test instead of assuming synchronization equals backup.
Cloud-specific recovery planning
Keep a local copy of critical files when internet outages would stop your work. Record account identifiers, recovery codes, billing ownership, and the steps needed to authorize a restore. For a large media library, maintain a local external drive or NAS so an entire collection does not have to be downloaded after a disaster.
Rank #3
- Easily store and access 1TB to content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop. Reformatting may be required for Mac
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
How should cost and capacity influence the decision?
There is no universal price winner because capacity, retention, drive count, and provider terms vary. Compare the full operating cost rather than the purchase price alone.
| Cost question | External drive | NAS | Cloud |
|---|---|---|---|
| What you pay first | Drive and, if needed, encryption or backup software. | Enclosure, drives, and possibly a battery backup or network upgrade. | Often an account and selected storage tier; exact pricing is provider-specific. |
| What recurs | Replacement and rotation drives over time. | Electricity, failed-drive replacement, upgrades, and administration time. | Subscription, storage growth, and potentially restore or transfer charges. |
| Capacity planning | Reserve space for source data plus versions and growth. | Reserve space for all devices, snapshots, and rebuild overhead. | Account for retained versions, upload bandwidth, and any service limits. |
For large files, calculate the time to upload the initial set and to restore it after a total loss. A low monthly fee is less useful if a metered connection makes recovery impractical. Conversely, a local appliance may cost more to purchase but reduce downtime for a business that cannot wait for a full download.
Which backup setup fits common situations?
One computer, modest data, unreliable internet
Use an encrypted external drive for scheduled local backups and keep a second drive somewhere else. This gives fast restores without depending on a connection while preserving an off-site copy for a local disaster.
Several household devices or a small office
Use a NAS as the centralized local target, then copy critical data to cloud storage or rotate external media off-site. Separate user accounts, multi-factor authentication, version history, and restore tests are essential because the NAS is online.
Rank #4
- Easily store and access 4TB of content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Frequent travel or no interest in hardware maintenance
Use a vetted cloud backup service with strong account security and tested retention, plus an offline or separately stored local copy for outages and provider-access problems. Keep recovery codes and restore instructions available when away from home.
Large photo, video, or project libraries
Keep the working library and a local external drive or NAS for fast restores. Use cloud replication or rotated drives for disaster recovery rather than attempting to download the entire collection after every incident.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →How do you build and maintain a reliable backup routine?
- Inventory the data. List computers, phones, external disks, application data, and irreplaceable files. Mark what must be restored first.
- Choose the local target. Select an external drive for simplicity, a NAS for multi-device centralization, or both when recovery speed matters.
- Choose the off-site target. Use cloud storage, a second NAS in another location, or a rotated drive that is not stored with the original.
- Automate schedules. Run backups frequently enough that the maximum acceptable data loss is realistic. Monitor completion notifications rather than assuming a scheduled job succeeded.
- Isolate at least one copy. Disconnect removable media, use separate credentials for an off-site destination, or apply provider controls that prevent immediate deletion.
- Protect access. Encrypt sensitive data and media, use unique credentials, enable multi-factor authentication, and limit who can modify backups.
- Test restoration. Recover representative documents, photos, and application files, then perform a full recovery exercise for the most important system.
- Document the process. Record what is covered, where each copy is stored, account and recovery details, retention settings, and the exact restore sequence. Update the document whenever hardware or software changes.
What should you do when a restore fails?
The backup cannot be found
Check whether the job used a different account, destination, or schedule. Review completion logs and the written inventory, then reconnect the correct drive or verify that the cloud account still has the expected retention period.
Files are present but too old
Inspect the schedule, excluded folders, and version-retention settings. Increase backup frequency or retention, and preserve a separate copy before changing the configuration so a current failure does not erase the last usable version.
Best Value
- High capacity in a small enclosure – The small, lightweight design offers up to 6TB* capacity, making WD Elements portable hard drives the ideal companion for consumers on the go.
- Plug-and-play expandability
- Vast capacities up to 6TB[1] to store your photos, videos, music, important documents and more
- SuperSpeed USB 3.2 Gen 1 (5Gbps)
The destination is inaccessible
For an external drive, try another cable or port and stop using it if it shows signs of physical failure. For a NAS, verify network connectivity and account permissions without granting broad administrator access. For cloud, confirm authentication, service status, and available bandwidth; keep a local copy for urgent work.
Restored files are encrypted or corrupted
Disconnect affected systems from shared storage, preserve the original evidence, and use an earlier version or offline copy. Do not reconnect a clean backup until the compromised account, computer, or NAS has been secured.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
What security controls apply to every option?
- Encrypt sensitive data and every removable or portable backup medium.
- Use strong, unique credentials and multi-factor authentication for cloud and NAS administration.
- Keep at least one backup offline or otherwise isolated from routine write access.
- Limit who can delete or modify backup history.
- Enable versioning or snapshots where supported, and set retention deliberately.
- Schedule backups, monitor their results, and test restores on a regular calendar.
- Maintain a written inventory so another trusted person can recover the data if you are unavailable.
“Frequently back up your data to reduce the risk of permanent data loss.” — Cybersecurity and Infrastructure Security Agency
Frequently Asked Questions
How much free space should a backup drive have?
Keep capacity for the current source data, expected growth, and the number of historical versions you intend to retain. If the drive is nearly full on the first run, it will not preserve useful history; move to a larger drive or reduce retention deliberately rather than deleting versions at random.
Can I use a USB flash drive as my main backup?
Flash drives are convenient for transferring a few files but are usually a poor sole backup because capacity, endurance, and loss resistance are limited. If you use one for a small emergency copy, encrypt it and keep a separate, regularly tested backup on a more suitable medium.
How often should I test a restore?
Test a few representative files after the initial setup and whenever you change software, hardware, accounts, or retention settings. Schedule a complete recovery exercise at an interval that matches how costly downtime would be; a backup that has never been restored is an assumption, not evidence.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsWhat information should someone else have if I am unavailable?
Give a trusted person the location of each physical copy, the recovery-key or account-recovery procedure, the inventory of covered devices, and the order in which systems should be restored. Store that document securely and update it whenever the setup changes.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
