Different File System Formats Available in Disk Utility ExFAT Let’s look at how to format your thumb drive for a Mac. Unless it’s specifically designed to work on a macOS, you'll need to reformat the flash drive. It’s because most computers run on Windows and most thumb drives ship with formats that favor a Windows environment. Most vendors chose the former.Have you ever tried to use a USB drive on your Mac only to realize you couldn’t write any files to it? Vendors faced a quandary: Format drives in the nearly universal FAT32/exFAT and let Windows users live with reduced performance when copying large numbers of small files or format them in NTFS for better performance under Windows-but in effect, render them write-protected on Macs and unreadable on other devices. Difficult as in terminal, command line, SUDO… It’s not for the average user. Apple eventually added NTFS write support as well, but here’s the thing: It was hidden, disabled it by default and difficult to turn on. It took longer, but eventually the Linux community felt comfortable enough with its NTFS write-code that it was added to the operating system kernel. Samsung’s T1 and T3 external SSDs are very fast writers, but not nearly as fast with small files if you format them in exFAT rather than NTFS. If your code screws up writing to a drive, you may have ruined someone’s digital life. Reading from NTFS within other operating systems soon became possible, but reading is non-destructive, so if you mess up with the code, you still have the original file. Regardless of the why, denying access to that code was like waving a red flag in the face of open-source programmers worldwide. It’s almost like they were in some sort of competition with other companies. Microsoft wasn’t feeling particularly generous when it came up with its second-generation file system, so the company didn’t tell anyone else how to implement it.
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