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To move files safely, copy them to the SSD, check that the files open from the drive, and keep the originals until you have confirmed the copy is usable. Don’t use Cut and Paste or delete the source as part of the transfer: if a move is interrupted, you could lose data. Before copying, check that the SSD has enough free space and that its format lets the computer write to it.
1. Check the SSD before copying
Make sure the computer recognizes it and has write access
Connect the SSD directly or with a suitable adapter, then confirm it appears in File Explorer on Windows or Finder on Mac. Check the drive’s available space against the files you plan to copy. A drive that lacks space—or one your computer cannot write to—cannot complete the transfer as intended.
On a Mac, select the drive in Finder and choose File > Get Info to inspect its details. Apple lists APFS and Mac OS Extended as Mac file-system formats, and exFAT as Windows-compatible. macOS may read an NTFS drive, but Apple says Disk Utility does not support writing to NTFS. If the Mac cannot write to the drive, resolve that before starting the copy. Apple’s external-drive guidance covers this issue and other reasons a Mac may not save files.
Choose a format for the computers that will use the SSD
| How you’ll use the SSD | Format to consider | Important qualification |
|---|---|---|
| Mac only | APFS | Apple describes APFS as the macOS default for macOS 10.13 or later and optimized for SSD and flash storage. Check specialized app requirements before choosing a format. |
| Mac and Windows | exFAT | Apple lists exFAT as Windows-compatible. Check compatibility with any other devices you plan to connect. |
| Mac using an existing NTFS drive | Do not assume the Mac can write to it | Apple says macOS may read NTFS, but Disk Utility does not support writing to it. |
These distinctions are based on Apple’s Disk Utility format guide and its format guidance for Final Cut Pro, Motion, and Compressor. Your existing format may already suit your needs, so formatting is not automatically necessary.
#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
Back up anything already on the SSD before formatting
Formatting erases the data on the volume. If the SSD contains files you want to keep, copy them somewhere safe before erasing it. Only reformat after confirming that its contents are expendable or backed up, and select a format that suits the computers that need to write to it. See Apple’s format guide for the options available in Disk Utility.
2. Find the files you want to transfer
Don’t assume everything is in one folder. On Windows, check the folders relevant to your account, such as Documents, Desktop, Downloads, Favorites, Music, Pictures, and Videos. On Mac, check your user folders and any other locations where you saved the files. Microsoft’s Windows external-storage instructions also point users to common personal folders.
Rank #2
- 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
If the files are important, make a clear list of the folders you intend to copy. That gives you something concrete to check against the SSD after the transfer.
3. Copy the files, leaving the originals in place
- Select the files and folders you want to transfer.
- Use Copy and then Paste into a folder on the SSD. Avoid Cut, Move, or any action that removes the source files during transfer.
- Wait for the copy operation to finish. Don’t disconnect the SSD while files are being copied.
Western Digital recommends Copy and Paste rather than Cut and Paste or Move because an interrupted move can result in data loss. Its drive-to-drive transfer guidance also advises preserving the source until the destination copy is backed up.
Rank #3
- 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.
4. Check the copied files before relying on them
Open the SSD in File Explorer or Finder and browse the destination folders. Compare them with the folders you intended to transfer, then open a selection of important files from the SSD. A completed progress indicator alone does not confirm that the copy contains the files you need or that those files are usable. Microsoft recommends browsing the external drive and checking the files after transfer in its Windows instructions.
Keep the originals until you have checked the destination. For important data, keep another backup as well: one external SSD holding the only copy is not a backup.
Rank #4
- 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
5. Eject the SSD before unplugging it
On Windows
When copying and checking are finished, use Windows’ Eject option for the SSD and wait for the system to indicate that it is safe to remove. Microsoft includes ejecting the external storage device in its Windows 10 and 11 file-transfer instructions.
On Mac
In Finder, eject the mounted SSD before unplugging it. If a copy is still running or the system will not eject the drive, wait until the operation is finished and try again rather than disconnecting it while it is in use.
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Best Value
- NEARLY 2X FASTER THAN OUR PREVIOUS GENERATION(8) – move 1,000 high-res photos in under 60 seconds(6) with up to 2000MB/s transfer speeds(2).
- IP65 RATING AND UP TO 3M DROP PROTECTION(3) – protects against spills and drops.
- POCKET-SIZED – fits easily in pockets and small bags.
- SPACE TO OWN YOUR AI CONTENT – speed and capacity to download your high-res clips and photo edits.
- 256-BIT AES ENCRYPTION(4) – helps keep private files secure with password protection.
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