If a file is missing and its backup is unavailable or damaged, stop using the affected storage, look for another independent copy, then choose a recovery method that matches the failure. Deleted files, a damaged Time Machine disk, an unusable iPhone backup, physical drive trouble and ransomware require different responses. Recovery is not guaranteed, and recovered files should be checked before you rely on them.
What to do first: protect what is still there
- Stop unnecessary activity on the affected storage. Avoid saving or downloading files, installing recovery software, formatting, creating partitions or running cleanup tools on the drive. Microsoft warns that new data can overwrite space where deleted-file contents remain, reducing the chance of recovery. Microsoft’s Windows File Recovery guidance recommends minimizing or avoiding computer use after a file is lost.
- Record the situation. Note the missing files, where they were stored, when they were last known to be intact, the type of backup, your device and operating system, and any error message. This helps distinguish accidental deletion from a backup-access problem or broader damage.
- Look for another copy before attempting repairs. Check the Recycle Bin or Trash, other computers and drives, cloud backup or sync services, version history, email attachments and device backups. Search by filename, folder, date or file type. If a cloud service is involved, take care not to replace a good cloud version with a damaged local copy.
- Keep recovery output separate from the source. If you use a recovery tool, save recovered files to a different drive, not the storage you are trying to recover. That avoids writing new data over material that may still be recoverable.
If the drive makes unusual noises, repeatedly disconnects or is no longer detected, avoid repeated scans and write operations. The platform guidance cited below does not prescribe a consumer procedure for physical drive failure, and a software scan does not repair physical damage. For irreplaceable files, seek help suited to the specific hardware problem rather than experimenting on the drive.
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Can you find the file without repairing the backup?
Often, the safest first step is to locate a copy that is independent of the failed backup. Check both places that may hold a complete file and places that may hold an earlier version: a different computer, external drive, cloud backup, sync-service version history, email attachment or another device backup. A sync service is not necessarily the same thing as a backup; check whether it has version history or a deleted-items area before assuming it contains a recoverable copy.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFor an iPhone or iPad backup on a computer that Apple reports as corrupt or incompatible, Apple advises updating the computer and device software, then trying another backup or an iCloud backup if one is available. The computer backup may simply not be usable. See Apple’s iPhone and iPad backup troubleshooting steps.
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If files were deleted from a Windows local drive
Microsoft’s Windows File Recovery is a command-line app from the Microsoft Store for trying to recover files deleted from local internal, external or USB storage when they cannot be restored from the Recycle Bin. It does not support cloud storage or network file shares. The source and destination drives must be different; if you have only one drive, Microsoft suggests using a USB or external hard drive as the destination. A separate destination prevents the recovery attempt from writing onto the drive being searched, but it cannot guarantee success.
The command structure is winfr source-drive: destination-drive: [/mode] [/switches]. Use Microsoft’s current Windows File Recovery article for the exact switches and examples that fit your case.
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Choose a mode based on the file system and loss
- NTFS, recent deletion: Microsoft’s guidance is to start with Regular mode.
- NTFS, older deletion, formatting or corruption: Microsoft’s guidance is to use Extensive mode.
- FAT or exFAT: Use Extensive mode; Microsoft supports non-NTFS recovery only in that mode.
- Unsure: Microsoft says to start with Regular. If it does not find the files, try Extensive when the file system supports it.
Deleted-file recovery is uncertain: data may already have been overwritten, and Microsoft specifically notes this can happen on SSDs. Do not treat repeated scans as a substitute for protecting the source drive.
Do not mistake Windows system recovery for file recovery
Windows offers recovery options for problems with the operating system, but those are not all ways to retrieve personal files. Microsoft warns some system-recovery options can cause data loss and recommends starting with the least disruptive option appropriate to the issue. Its guide distinguishes a backup—copies made in advance—from restoring those copies to their original or a new location. Check Microsoft’s Windows recovery-options guide and its backup, restore and recovery guide before choosing a system reset or reinstall.
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If a Time Machine backup is missing or inaccessible
Before erasing or restarting a Time Machine backup, work through Apple’s connection and disk checks. Confirm the disk is supported and has adequate capacity; check its direct USB connection or network connection; and, for a network backup disk, ensure the Mac and disk are on the same network. Apple recommends using Disk Utility to repair the backup disk. Some files may also need cloud syncing to finish before they can be backed up. Apple’s Time Machine troubleshooting guide says the disk should ideally have at least twice the storage capacity of the Mac. That is Apple’s capacity recommendation for a backup disk, not a universal requirement for recovering a particular file.
Do not erase the backup disk as an early troubleshooting step: erasing can destroy the remaining copy. Apple presents erase-and-start-again as a last resort after other solutions.
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For a full Mac restore
Apple’s process is to reinstall macOS first, then use Migration Assistant to transfer data from the Time Machine backup. Connect and power on the backup disk; a network disk needs to be reachable on the same network. You may need the disk credentials and, if the backup is encrypted, its password. Startup and Recovery steps can vary by Mac model and macOS version, so follow Apple’s current Time Machine restore guide for the relevant instructions.
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- Update the Mac or PC and the iPhone or iPad software, then try the restore again. Apple’s current troubleshooting page covers the applicable steps: Apple iPhone and iPad backup troubleshooting.
- If that computer backup still cannot be restored, try another backup or an iCloud backup if available. Apple notes that an unusable backup may not be usable.
- If you use Windows and iTunes hangs or a backup does not finish, Apple lists security software as one possible factor to check.
A third-party backup-repair utility is not an Apple-supported fix in this guidance. Avoid assuming that a tool can make a corrupt or incompatible backup restorable.
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If the corruption may be ransomware
Ransomware or another destructive event is not the same as accidental deletion: the system and the trustworthiness of restored files both matter. NIST’s guidance on recovering from ransomware and other destructive events is written for organizations and emphasizes restoring data whose accuracy and integrity can be trusted. Do not assume a decryption tool exists or restore potentially compromised files onto a connected clean system without validation. If this is a personal device and compromise may still be ongoing—or the files are critical—seek incident-specific help.
How to check files after recovery
File presence alone does not show that a recovered file is complete or trustworthy. Open important files and check that their contents are intact; compare them with another known-good version when one exists. For a destructive event such as ransomware, follow an appropriate validation and security process before putting restored files back into ordinary use. NIST’s recovery guidance focuses on integrity as well as restoration, rather than treating any file that reappears as safe to trust.
Quick Recap
What not to do while trying to recover files
- Do not save recovered output to the same drive being searched when the recovery method requires a destination.
- Do not format, repartition or erase a drive as a first diagnostic step.
- Do not keep using a drive unnecessarily after deletion; new data can overwrite deleted-file contents.
- Do not repeatedly scan a drive that shows signs of physical failure and assume software can repair the hardware.
- Do not confuse a Windows system reset or reinstall with restoring a personal-file backup.
- Do not assume that a cloud sync copy is a backup or that a damaged file should overwrite a potentially healthy version.
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