Verify or repair the unreadable disk, USB or SD card using Disk Utilityģ. It's good to back up the disk in question on Mac in advance with EaseUS Todo Backup for Mac. To correct it, please convert NTFS to FAT32.ĭisk formatting will erase data for good. If it is formatted with the NTFS format, then it is not hard to understand why it is unreadable on Mac. Check the file system formatĬheck the file system format of the external hard drive, SD card, USB flash drive or other devices. Just plug in a different external hard drive to Mac, if it appears on Finder, it suggests that the problem is related to the external USB devices, not the Mac.
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Here, our advice about how to solve this problem is: Step 1. Just like what happened in the story mentioned above, many Mac users have a similar experience of this issue and want to find a fix. In Mac OS X, the error message usually reads 'the disk you inserted was not readable by this computer.' But if the system files or the disk is corrupted, error messages will pop up and prevent you access the device and data. To open removable storage devices like an external hard drive, SD card, USB flash drive or even an Android phone or tablet, you usually have to insert it into a Windows computer or Mac. Whenever I plugged it into my MacBook, I get the error message 'the disk you inserted was not readable by this computer.' I have many family pictures and working documents saved on the USB, is there any way to fix the flash drive and get access to my data?"įixes to 'The disk you inserted was not readable by this computer' error "My Sandisk USB flash drive becomes unreadable and inaccessible for unknown reasons. USB says 'the disk you inserted was not readable by this computer'
Open Disk Utility > Choose problematic disk and click "First Aid" > "Repair disk" > "Erase". Full stepsĬonnect the external device to Mac > Go to "Utilities" > Select the device and click "First Aid".
Full stepsĬheck if the file system of your external device is NTFS. Connect another external USB to Mac, check if it appears in Finder.
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