Plugged it into my MacBook Pro on a USB adapter and it didnt recognize the disk even.49 answers 1 vote: Same thing, but I didnt upgrade. Do I have to click Initialize button? Will that remove all data off the hard drive?"External USB drives that still mount in Catalina dont mount in. All I get is the error which keeps saying it is not readable by this computer. However, the hard drive no longer works as before. It was an internal hard drive originally, and I add a case to make it as external hard drive. Tried booting from USB drive."Hey guys, my hard drive became unreadable by computer suddenly.The external disk mentioned here can be an external hard drive, pen drive, USB flash drive, memory card (e.g.SD card), SSD, iOS devices and so on. It appears that the USB drive is corrupted, how can I fix it?"The Mac computer and operating system supports to access both internal hard drive/SSD and external disks. There was a sudden system shut down and when system booted I received the error: the disk you inserted was not readable by this computer. Mostly the USB flash drive has been working well until this morning. "I'm in urgent need of help about my corrupted USB flash drive.For example, the disk you inserted contains bad sectors, the USB port is damaged. Failed failure: the unreadable error might be caused by failed disk or USB port. Along with the error message, there are three options: Initialize, Ignore and Eject.Why does my Mac say the disk you inserted was not readable by this computer? As far as reasons behind the unreadable disk, you can refer to following factors: If the connected disk is not unreadable, you will get an error message: The disk you inserted was not readable by this computer.The disk is encrypted: partition on the inserted USB disk might be encrypted, e.g., Windows BitLocker. The USB drive might be removed from computer abruptly. Once file system gets corrupted, say becoming RAW, operating system won't be able to read or write it. Corrupted file system: Operating system counts on file system to access files in the partition. The USB drive was used under Windows with NTFS file system which cannot be recognized by Mac OS.
![]() If the new USB drive still cannot be read by computer, then the error might be caused by system.Solution #2: Check file system type for the unreadable diskSeeing that the error can also appear if the inserted USB drive uses a file system format which is not supported by Mac OS X, for example, NTFS file system cannot be recognized by Mac OS X. If the unreadable error still appears, there should be something wrong with the USB drive.Again, safely unplug the problematic USB drive from computer and then insert a working USB drive. Below are the most recommended solutions which have been verified effective by many users.Solution #1: Make basic checks for hardwareThe error might be caused by faulty connections between the USB disk and Mac computer (such as MacBook Pro, MackBook Air, iMac, etc.), there you can do some basic checks to eliminate the possibility.Safely remove the unreadable USB drive form your Mac computer and then insert it to a different USB port or another computer to see if you still get the same error. However, some solution may lead to data loss, and data backup should be done beforehand. Ps2 emulator on macTo solve this, you can remove encryption in Windows and then use the drive on Mac computer.Solution #5: Repair the drive using First AidStep 1: On the dialog box which shows the unreadable error, click Initialize button and Disk Utility will open.Step 2: On Disk Utility, click View menu and select Show All Devices.Step 3: Select the disk in question and click First Aid tab. When the encrypted disk is connected to Mac, it definitely cannot be recognized. A disk can be encrypted by a couple of methods, one of the most common methods is BitLocker in Windows. You can select "Automatically keep my Mac up to Date" to make your computer install future updates automatically.Solution #4: Make sure the drive is not encryptedThe error "The disk you inserted was not readable by this computer" can occur if the disk you connect is encrypted. Hence, you may as well check and update drivers:Step 1: Click Apple menu and then click System Preferences > Software Update.Step 2: You can click Upgrade Now button if there are updates available. Fortunately, data recovery from unreadable hard drive or USB drives are available in most cases provided that the device is not physically damaged. Because that indicates files are lost and not accessible if there are not backups. Bonus tip: How to recover data from unreadable hard drive or USB drive in Windows 10/8/7?Whatever the cause, it is frustrating when hard drive or USB drive becomes unreadable by operating system. Should you need files on the disk, backup or perform data recovery in advance.Step 1: In Disk Utility, click View > Show All Devices.Step 2: Select the drive you want to format on the left pane and click Erase button.Step 3: Enter a name and select a format for the drive and click Erase button. The shortcoming of this solution is that files will be lost after formatting. Always eject external disk safely. Here are some notes you can pay attention to:1. How to avoid disk not readable error on Mac?As aforementioned, "the disk you inserted was not readable by this computer" can be caused by various reasons, and you need to take good care of the disk to keep it away from the error. The click Start button run a complete and deep scanning for the drive.Step 3 Preview files and check if they are correct.Step 4 Copy files to different location to get them recovered. Otherwise, move to step 2.Step 2 Select the unreadable drive again and click File Recovery button. Select the unreadable drive and click Tools > Load Current Partition Intelligently.If your files can be displayed after DiskGenius finishes loading files, you can simply copy them to another accessible partition and complete the recovery task. ![]() ConclusionIn summary, when your external hard drive, memory card, pen drive or USB flash drive is on longer readable by computer, you can try methods presented above to get it fixed. Then click Tools > Check.Solution 2: Format the USB drive in Disk Management.Solution 3: Check and repair bad sectors for the unreadable USB with DiskGenius Free edition. Here are some fixes.Solution 1: In File Explorer, right-click the USB and choose Properties. How to recover files from unreadable drive?Here are steps of recovering files from unreadable or inaccessible drive:Step 1: Install and launch DiskGenius from a Windows computer.Step 2: Use "Load Current Partition Intelligently" to load lost files from unreadable drive or try File Recovery function to search for lost files.Step 3: Copy found files to another working partition.Repairing an unreadable USB may cause data loss, and you should make sure files in the USB drive have been recovered in advance. Usb Drive Won'T Read Formatted How To Deal WithFor more information about how to deal with a physically failed disk, kindly contact the manufacture for help.
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