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For a desktop PC with a free, compatible SSD slot, an internal SSD is the simpler default for Steam games. It avoids relying on an external drive’s cable, port, and continued connection. An external SSD can be a practical way to add capacity when an internal upgrade is not feasible, but Steam warns that external drives may have performance issues or disconnect unexpectedly. That warning applies to external drives generally; Steam’s guidance does not compare external SSDs with internal SSDs in a controlled test.
Can Steam games run from an external SSD?
Yes. Steam lets you add a library location on another drive and install or move games there. In the Steam client, open Settings > Storage, add the drive as a library location, then use the Move option to transfer an installed game. See Steam Support’s guide to moving a Steam installation and games.
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Steam distinguishes between storing games on another drive and installing Steam itself on an external drive. Steam Support says, “It is not recommended that you install Steam to an external hard drive, due to potential performance issues.” This is Steam’s warning about external hard drives; it does not specifically assess external SSDs.
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External vs. internal SSD: what matters?
| Factor | Internal SSD | External SSD |
|---|---|---|
| Setup and connection | Installed in a compatible slot; no external cable or drive connection to maintain. | Connects through an external port and cable; it needs to remain attached and available. |
| Compatibility | Must match the PC’s supported form factor and interface. There is no universally compatible model. | Depends on the drive, interface, port, host system, and connection stability. |
| When it suits | A straightforward choice when the PC has a free compatible slot and the upgrade is practical. | A way to add game-library capacity when an internal upgrade is impractical, provided the connection is dependable. |
| Steam’s stated caveat | The cited Steam guidance does not make a general performance guarantee for internal SSDs. | Steam warns external drives can have performance issues and may disconnect unexpectedly; it does not isolate SSDs from HDDs. |
The table’s practical trade-offs follow from the connection and compatibility requirements, not from a published head-to-head benchmark. The reviewed Steam guidance does not establish universal load-time, frame-rate, or reliability differences between internal and external SSDs. Results can depend on the particular drive, its interface and port, the host PC, connection stability, and the game.
#1 Best Overall
- Get NVMe solid state performance with up to 1050MB/s read and 1000MB/s write speeds in a portable, high-capacity drive(1) (Based on internal testing; performance may be lower depending on host device & other factors. 1MB=1,000,000 bytes.)
- Up to 3-meter drop protection and IP65 water and dust resistance mean this tough drive can take a beating(3) (Previously rated for 2-meter drop protection and IP55 rating. Now qualified for the higher, stated specs.)
- Use the handy carabiner loop to secure it to your belt loop or backpack for extra peace of mind.
- Help keep private content private with the included password protection featuring 256‐bit AES hardware encryption.(3)
- Easily manage files and automatically free up space with the SanDisk Memory Zone app.(5). Non-Operating Temperature -20°C to 85°C
Can an external SSD affect gameplay?
It can, if the game experiences delayed disk responses, but that does not mean every external SSD will cause stuttering. Steam explains that games may read or write data during play and that slow disk responses can pause a game. Its hardware troubleshooting guidance says response times above 10–20 ms may start causing performance problems; this is troubleshooting guidance, not a universal SSD cutoff or a comparison of drive types. See Steam Support’s hardware troubleshooting guidance.
Steam also warns that an external drive can disconnect at an inopportune time. If a drive disconnects or the PC is forcibly shut down while it is being written, Steam says games may appear uninstalled and library information can be corrupted. Keep the drive connected during play and avoid interrupting transfers or shutdowns while the drive is active.
Rank #2
- Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.)
- Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle.
- Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.)
- Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook.
- From Sandisk, a brand professional photographers trust to take on assignments.
Which option should you choose?
Choose an internal SSD when the upgrade is compatible and practical
- Your PC has a free slot that supports the SSD’s form factor and interface.
- You want the library on a drive that does not depend on an external cable and port remaining connected.
- You are comfortable installing the drive or arranging the upgrade.
Choose an external SSD when capacity is the main constraint
- Your PC has no free compatible internal slot, or opening and upgrading it is impractical.
- You can keep the drive reliably connected to the PC.
- You accept Steam’s general warning about external-drive performance and disconnection risks.
Before buying an internal SSD, check your PC’s documentation for supported drive form factors and interfaces. For an external SSD, check that the drive and connection suit your system and intended use. The cited Steam pages do not identify a universally suitable model or provide comparative test results, so a specific loading-time or frame-rate improvement cannot be promised.
What about Steam Deck?
Steam Deck storage is a separate case from a desktop PC’s internal-versus-external SSD choice. Steam says the Deck uses built-in storage by default and supports microSD cards rated UHS-I class 3 or better. UHS-II and UHS-III cards are expected to work, but their higher transfer speeds are not supported. Manage storage from Steam > Settings > Storage. Steam’s Steam Deck storage guide does not recommend an external SSD as a game-library option, so the desktop comparison should not be treated as Deck-specific advice.
Quick Recap
Best Value
- MADE FOR THE MAKERS: Create; Explore; Store; The T7 Portable SSD delivers fast speeds and durable features to back up any endeavor; Build your video editing empire, file your photographs or back up your blogs all in an instant
- SHARE IDEAS IN A FLASH: Don’t waste a second waiting and spend more time doing; The T7 is embedded with PCIe NVMe technology that brings fast read and write speeds up to 1,050/1,000 MB/s¹, making it almost twice as fast as the T5
- ALWAYS MAKE THE SAVE: Compact design with massive capacity; With capacities up to 4TB, save exactly what you need to your drive – from large working files to game data and everything in between
- ADAPTS TO EVERY NEED: Whether using a PC or mobile phone, count on the T7 for extensive compatibility²; It’s a true team player when it comes to heavy-duty application usage or file-saving
- HI RESOLUTION VIDEO RECORDING: Record Ultra High Resolution (4K 60fs) videos directly onto the T7 Portable SSD with your favorite camera or mobile devices; Supports iPhone 15 Pro Res 4K at 60fps video and more³
Rank #4
- 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.
Rank #3
- Capacity Display Variance: 500GB external ssd often appears as around 465GB on Windows. MacOS can show full 500 GB capacity. This is binary calculation difference and doesn’t affect SSD hard drive actual physical storage
- 1050 MB/s Speed: Instantly access to your files with blazing-fast 10Gbps external SSD read up to 1050MB/s and write up to 1000MB/s. LED Light indicates USB SSD instant activity
- Data Security: Solid state drives S.M.A.R.T. health diagnostics and adaptive TRIM optimizing data block management ensures consistent write speeds and extends the longevity of the portable SSD
- USB-C & USB-A Cable: Both cables featuring rapid USB 3.2 Gen2, this USB SSD effortlessly bridges devices, enabling seamless cross-platform file transfers and backup between computers, smartphones, tablets and iPhone
- Always Fast: No slowdowns for large file transfers. With SLC caching (25% of current available capacity allocated as high-speed cache), this external SSD delivers steady 10Gbps for transfers within the cache capacity
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