Use the steps below to fix it and let us know in the comments which one worked for you. Show All Devices and Erase the Parent Drive. By default, Disk Utility only shows the Volumes on your connected drives, rather than the drives themselves. A Volume is the partition or section of a drive you store data in. To start things off, connect the USB flash drive to your Mac. Make sure there's no valuable data on there because it will be permanently wiped out in a couple minutes. Open Disk Utility (Applications Utilities) and click on your flash drive in the list on the left. Go to the Partition tab and select '1 Partition' from the Volume Scheme.
If you see a circle with a slash, your macOS system folder is likely damaged.
Based on your current circumstances, you'll need to use another Mac in order to repair yours. Connect an empty flash drive to the other Mac and create a bootable installer using the steps in this article:
Make sure your flash drive is named MyVolume before using the Terminal command.
Once you've made a bootable installer, connect it to your malfunctioning Mac and hold the Option key while turning it on. Release when you are presented with various startup disks to choose from. Use the arrow keys to select Install macOS High Sierra, then hit Return (Enter). Your Mac should proceed to boot Recovery Mode using the flash drive. When the Utilities menu appears, choose Reinstall macOS. (You will not lose your data.) Select Macintosh HD as the target volume and let the installer repair your Mac. If all goes well, your Mac should restart to the login screen when it's done (or to a setup assistant if you wiped your hard drive).
Hope this helps!
Feb 27, 2018 9:23 PM
by Shirly Chen, updated on 2018-04-25 to Erase Data
Now, your USB flash drive gets damaged, corrupted or becomes inaccessible, what should you do to fix the issues? If you have no ideas about what you should do, just follow this guide. In this guide, we will show you how to fix inaccessible/corrupted/damaged USB flash drive within 2 safe steps: recover your data, fix the issue.
1-Recover lost data from inaccessible/corrupted/damaged USB flash drive
Mac catalina new. Yes, the first step is recovering the lost data from the inaccessible/corrupted/damaged USB flash drive. Of course, if you don't want to recover your data from the inaccessible/corrupted/damaged USB flash drive, just skip the step1.
Do Your Data Recovery for Windows/Mac can help you easily and quickly recover lost data from inaccessible, corrupted or damaged USB flash drive. Here are the steps:
Step 1: Download and install Do Your Data Recovery for PC/Mac on your computer, then run it.
Step 2: Connect the inaccessible/corrupted/damaged USB flash drive with your computer. Select it to start data recovery.
Step 3: Select the file types, click on 'Scan' button to scan the inaccessible/corrupted/damaged USB flash drive to find lost data.
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Step 4: Once the scan is completed, preview and recover the files you have lost. If you can't find all lost files after quick scan, just try advanced recovery mode to find much more lost files.
Do Your Data Recovery is so easy-to-use that it can easily and completely recover your data from inaccessible, corrupted or damaged USB flash drive on PC or Mac. So, before you format the inaccessible/corrupted/damaged USB flash drive, just use it to recover all your data. After you recover all your data, you can format or reformat the inaccessible/corrupted/damaged USB flash drive to fix the issue.
2-Format the inaccessible/corrupted/damaged USB flash drive
In order to fix the inaccessible/corrupted/damaged USB flash drive (reset the inaccessible/corrupted/damaged USB flash drive to factory status), you need to format the inaccessible/corrupted/damaged USB flash drive. Disk Utility on PC or Mac can help you easily and securely format the inaccessible/corrupted/damaged USB flash drive. But, if you computer can't recognize the inaccessible/corrupted/damaged USB flash drive, or you want to permanently erase data on the inaccessible/corrupted/damaged USB flash drive, you need special data erasure tool.
DoYourData Super Eraser can help you format inaccessible/corrupted/damaged USB flash drive on PC/Mac. Here are the steps:
Step 1: Download and install DoYourData Super Eraser on your computer, then open it.
Step 2: Choose this mode 'Wipe Hard Drive', then connect your USB flash drive with your computer.
Step 3: Select the USB flash drive, click on 'Wipe Now' button to format and erase the inaccessible/corrupted/damaged USB flash drive. When the process gets finished, the data on the inaccessible/corrupted/damaged USB flash drive will be permanently erased – the inaccessible/corrupted/damaged issue will be fixed.
As you've seen, it is very simple to fix inaccessible/corrupted/damaged USB flash drive – you data can be recovered; the inaccessible/corrupted/damaged USB flash drive can be formatted. No damage! It like you will get a brand new USB flash drive. If you have any question, just contact us.
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