Select Mac OS Extended (Journaled), or your. Click on the dropdown menu next to Format. Click on the Erase tab displayed at the top of the Disk Utility window. Click on the name of your USB drive in the left window pane in Disk Utility. The Disk Utility window will open and display on-screen.
![]() Usb Storage Formatting Full Compatibility WithUnless you have extraordinary needs, you can safely ignore two of them: Mac OS Extended (Case-sensitive, Journaled) and Free Space. If the drive is listed as NTFS-formatted, you're going to need to format it to something else if you want full compatibility with Mac OS X.There are several possible file system formats you can use for a USB flash drive, and changing them in Disk Utility is as easy as selecting the number of partitions you want on the drive (usually just one), picking the format you want for the drive, and clicking "Apply." Note that this will erase all information on the drive, so make absolutely sure you've got copies of everything before moving forward.Disk Utility gives you five different choices for drive formats in OS X Lion. If the drive's format comes up as MS-DOS (FAT) or, less likely, ExFAT, you may be able to simply leave the drive as-is and not bother reformatting it. Previous Tip Next Tip Reclaim Hard Drive Space by Shrinking.If you're transferring files from Macs to PCs, this won't be an issue however, transferring files from PCs to Macs won't be possible if your drive is formatted in "Mac OS Extended (Journaled)." If you will only be working with Macs and not PCs, this may not be an issue. The "Mac OS Extended (Journaled)" option will have the highest degree of support for Mac OS X features, and there's no limit to the size of files you can put on the drive.Disadvantages: Windows-running PCs can read files from drives formatted this way, but they can't write to them (at least not without the same amount of work it takes to get OS X to write to NTFS-formatted drives). You can even set up an OS X startup drive if you have the right files, the know-how, and a big enough flash drive, which will allow you to boot your Mac off an external disk if something goes wrong with your built-in drive. It also includes support for features from OS X Lion, such as Versions.Furthermore, FAT32 doesn't support OS X Lion's Versions feature - something users have discovered the hard way when working directly off of files stored on a USB flash drive (something we recommend against doing). You also can't create a startup drive for your Mac using this format. It's the closest thing we have to a universal file system format, which is why most flash drives are formatted this way right out of the box.Disadvantages: FAT32 doesn't support files larger than 4 GB, and that's its greatest drawback. Virtually all cameras and videocameras support FAT32, too. You can also move files to video game systems like the PlayStation 3, Xbox 360, and Wii. A drive formatted this way can easily transfer files between Macs and PCs. Android emulator for mac open sourceOf greater issue is that most consumer electronics (cameras, camcorders, video game systems) don't support exFAT, either. If you won't be dealing with older Macs or PCs, this may not be a problem. It has one big advantage over FAT32: exFAT supports file sizes larger than 4 GB, so if you have a need to move huge files between Macs and PCs, this is likely the format you'll want for your flash drive.ExFAT is supported by the following operating systems:Mac OS X Snow Leopard (10.6.5 or greater)Windows XP SP2 or later (with an additional update for exFAT support)Disadvantages: As a relatively newer file system format, exFAT isn't supported in older versions of Mac OS X (anything prior to 10.6.5) or anything older than Windows XP SP2.
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