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Take a look online to make sure the files you're trying to transfer to the Mac are compatible with macOS. If your drive shows up on a Mac, but it appears to be empty, it could be a problem with the types of files you're trying to transfer. Make Sure the Contents of the Drive Work With macOS If it doesn't work anywhere, then you can be certain there's a problem with the drive. Try using a different drive or a different port instead.Īlternatively, try using your USB drive with a different computer to see if it works with that. Then, on the top side under the Disk Utility. Step 2 On the left side of the Utilities screen, find the name of the external hard drive you want to format and select it. If your USB flash drive or external hard drive doesn't show up in Disk Utility, then there is probably a physical problem with the drive or the USB port on your Mac. Here's how to use it: Step 1 Connect the external hard drive you want to format to your Mac, then start the Disk Utility app that you can find under Applications -> Utilities. Click the First Aid button in Disk Utility to fix any issues with the drive, then try to access it in Finder again. I am transferring large (5-10GB) HD video files.
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The next time you connect the disk, Mac OS X will attempt to repair any damage to the information on the disk'. To eject a disk, select it in the Finder and choose File > Eject. If possible, always eject a disk before unplugging it or turning it off.
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If your USB drive is in ExFAT, FAT32, APFS, or Mac OS Extended format then it should work on your Mac. In text: 'The disk was not ejected properly. So you'll need to reformat your drive if it uses NTFS format.
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