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For everyday file sharing between a Windows PC and a Mac, format the external SSD as ExFAT. Back up its files first: formatting erases the selected volume. On a Mac, use Disk Utility; on Windows, use Disk Management.
Choose the right format
| Use | Choose | What to know |
|---|---|---|
| Share ordinary files between Windows and Mac | ExFAT | Apple identifies ExFAT as Windows-compatible and recommends it for disks over 32 GB. It is the practical choice for most external SSDs used on both platforms. Apple’s Windows-formatting guidance and available file-system formats. |
| Use the SSD only with Macs | APFS | Apple’s file system for macOS 10.13 or later, optimized for flash and SSD storage. Apple specifically recommends APFS for external storage used with Final Cut Pro, Motion, and Compressor. Apple’s format guide and media-app storage guidance. |
| Windows compatibility on a disk 32 GB or less | MS-DOS (FAT) | Apple’s Disk Utility instructions give this size condition for FAT. For disks over 32 GB, Apple recommends ExFAT instead. Apple Support. |
| Write to an NTFS drive from a Mac | Do not rely on Disk Utility | macOS may read NTFS, but Disk Utility does not support formatting NTFS and a Mac may not write to an NTFS volume. Apple’s format guide. |
These recommendations concern compatibility and intended use; the cited guidance does not establish comparative speed benchmarks for the formats.
Before formatting
- Copy anything you need to another location. Apple warns that formatting erases the files on the selected disk or volume, and Microsoft warns that formatting destroys data on the selected partition. Apple Support; Microsoft Support.
- Confirm the correct drive is selected. Formatting the wrong disk or volume can erase its contents.
- Check whether the drive is reserved for backups. A drive used for Time Machine may be set aside for that purpose rather than general file storage. See Apple’s external-drive troubleshooting guidance.
Format the SSD on a Mac
- Back up the files you want to keep.
- Open Disk Utility and choose View > Show All Devices.
- In the sidebar, select the external physical disk—the device at the top of its hierarchy—then click Erase. Apple notes that the Scheme control may only appear when the physical device is selected. Apple’s initialization instructions.
- For a new or initialized drive, choose GUID Partition Map as the scheme. If you do not see the Scheme option, check that you selected the physical disk rather than only a volume.
- Choose ExFAT for ordinary Windows/Mac sharing on a drive over 32 GB. Choose MS-DOS (FAT) only for a disk 32 GB or less when following Apple’s Windows-compatibility guidance. For Mac-only use, choose APFS.
- Enter a name for the volume, click Erase, and then click Done. Apple’s guide notes that erasing removes files from the selected disk or volume. Format a disk for Windows computers in Disk Utility.
Format the SSD on Windows
- Back up files on the volume you plan to format.
- Open Disk Management. Microsoft documents this tool for Windows 10 and Windows 11; it can initialize disks and create or format volumes. Microsoft’s Disk Management guide.
- If the SSD is new, bring it online if needed and initialize it. Choose GPT for modern UEFI systems, large drives, or when you need more than four partitions; MBR is intended for older hardware or systems without UEFI support.
- To use unallocated space, right-click it and create a New Simple Volume. To reformat an existing volume, right-click that volume and choose Format.
- Follow the prompts and select ExFAT for Windows/Mac file sharing. Formatting erases data on the selected partition; Microsoft distinguishes this from the type of format: a quick format creates a new file table but does not fully overwrite or erase the volume. Microsoft Support.
Formatting is not secure erasure
Formatting prepares a volume for use; do not treat it as secure sanitization of sensitive data. Apple says secure erase options are unavailable in Disk Utility for SSDs. If you are beginning to use an SSD and want to protect data, Apple suggests considering FileVault encryption. Apple’s Disk Utility instructions.
Quick Recap
Best Value
Sale
Sandisk 1TB Extreme Portable SSD, Up to 2000MB/s Transfer Speeds-New Model
- 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).
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Rank #4
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Samsung T7 Portable SSD 1TB Titan Gray, USB 3.2 Gen 2, Up to 1,050MB/s
- 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
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- 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
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Rank #3
Sandisk 1TB Portable SSD, Up to 800MB/s Read Speeds, Black (Old Model)
- 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.
Rank #2
Sale
SSK Portable SSD 500GB External Solid State Hard Drive USB C Up to 1050MB/s
- 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
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- 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
#1 Best Overall
Sandisk 2TB Extreme Portable SSD, Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware, External Solid State Drive, SDSSDE61-2T00-G25
- 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.)
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- 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
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.
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