![]() Which Format Is Best For External Drives With M1 & M2 Macs? Click Erase to format the drive and then click Done.Note that this secure erase option is not available on all external hard drives such as Solid State External Drives (SSDs) which includes many Thunderbolt external drives. If you are erasing sensitive or confidential data on the external hard drive while formatting it, you can also click on Security Options which allows you to select how many times you want to overwrite the data.When you’ve chosen the file format you want, you can then enter a name for the drive that you’d like to appear when you use it on your Mac such as “Backup Drive”.You can find more information about all the different formats available here. If you want to use the external drive with your Mac and a Windows PC, choose ExFAT. In summary, if you’re going to use the external drive only with Apple devices such as your Mac and you’re using High Sierra or later, just select APFS. – MS-DOS (FAT) and ExFAT which is compatible with both macOS and Windows but MS-DOS (FAT) can only transfer files smaller than 4GB and is rarely used anymore. Mac OS Extended (Case Sensitive) means folders on the drive will be case sensitive so “Mac” and “MAC” would be considered two different folders. Mac OS Extended (Journaled Encrypted) means you’ll need a password to access the drive. – Mac OS Extended (Journaled) is also known as HFS+ which is used by macOS 10.12 Sierra or earlier. ![]() If APFS does not appear in the list of formatting options, you must first format the drive in Mac OS Extended Journaled first (see below) and then APFS will appear from the list of drop-down options as long as you are using macOS 10.13 High Sierra or later. APFS Encrypted means you’ll need a password to access the drive. APFS (Case Sensitive) means folders on the drive will be case sensitive so “Mac” and “MAC” would be considered two different folders. – Apple File System (APFS) which is used by macOS 10.13 High Sierra or later and is the format required by Time Machine to backup your Mac to an external drive. When you click Erase, a format menu will pop-up with three main choices with sub-formats:
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