USB Drive not working on Mojave? How to Rescue Data from Corrupt USB?

The blog spotlights the reasons and symptoms of USB storage drive corruption and USB not working on macOS Mojave 10.14, High Sierra 10.13 and on below OS X versions. It also suggests the best method to recover data from a corrupt USB drive on Mac via Stellar Data Recovery Professional. Watch the video to rescue data from a USB on Mac using the mentioned software.

A USB drive or removable data storage medium is widely used for storing and transferring data from an iMac, MacBook Pro, and Mac Mini. Its portable nature makes it even more scalable as well as popular among users using different macOS. Even though the ability to transfer a large amount of data among various devices makes it user-friendly, this attribute sometimes creates a few difficulties too. This calls for the need to repair the USB drive to recover the entire data.

When you connect your USB device to different machines, chances for its corruption is higher. In simple words, the more you connect to different systems, the more will be the possibilities of data corruption. Users encounter data loss due to virus or malware that the device may have infected with from the connected system. Alternatively, the corruption issue may occur due to the broken file structure when you eject the device abruptly.

Reasons of USB Drive not Working and USB Corruption on Mojave, High Sierra

  1. Issue with the USB driver that makes the storage drive unrecognizable
  2. Improper ejection of the USB drive when write operation is still on the process
  3. Connection to a system infected with virus may lead to corruption of files
  4. Damage of drive’s file system due to sudden power outage/surge
  5. In case of flash drive instead of hard drive, wearing of NAND cells due aging and usage

Symptoms of Drive Corruption on any macOS including Mojave

  • macOS or OS X fails to recognize your USB drive in Finder
  • Finder displays the drive wherein the incorporated files and folders appear lost
  • USB drive has files with unknown/unusual file names that do not open when accessed
  • Error messages while accessing data from any of the folders and incorporated files

If you observe any of the above symptoms, then immediately resolve the issue using the possible troubleshooting methods.

USB Drive Recovery on any macOS including Mojave

The troubleshooting methods that you can perform are as follows:

  1. Connect the USB storage drive to another USB port on your Mac; chances are the other port can detect the drive. If it does, then it means the previous port is not working.
  2. Connect the USB device to another Mac machine to check if there is an issue with your system’s USB driver. If the USB device works, then update your system’s driver.
  3. Back up data from the USB drive to prevent any data loss, and then use Disk Utility’s First Aid to verify and repair the external storage drive.
  4. If you cannot backup, then recover data using a professional Mac data recovery software. You may even image or clone the drive as a safety measure prior recovery to avoid data loss.

Stellar Data Recovery Professional for Mac

The new, advanced, and specialized third-party Mac Data Recovery software—Stellar Data Recovery Professional—comes to your rescue at never before features and benefits. The software helps you to rescue lost, deleted, or inaccessible data from all kind of USB storage devices from all Mac machines perfectly. You can recover documents, archives, emails, videos, audio, and photos using this advanced utility. The software is compatible with macOS Mojave, has complete APFS support, and provides a complementary Drive Monitor module that can monitor, map, clone, or show the S.M.A.R.T. status of the internal as well as connected USB drives.


The blog apprised the reasons and symptoms of a corrupt USB storage drive on Mac, be it external SSD, HDD, or USB Flash Drive. It also listed the troubleshooting methods including the easiest and the best method via Stellar Data Recovery Professional if all other methods fail to rescue data from the USB drive. You can use the software to recover data even if you have accidentally formatted the USB drive. Do not forget to free download the utility on macOS Mojave (the software is compatible with the latest macOS) to scan and preview the recoverable files. The registered version of the software allows you to save files and use the novel Drive Monitor module.

When you have successfully rescued the data from your corrupt USB drive, your next plan of action would be to develop a strict backup strategy and follow it as per schedule. With this, you would not have to worry about losing data in future! A little step can go a long way!

  1. Mark February 12, 2019
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    • Vishal January 31, 2019
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  7. Ruth McIntire October 27, 2016
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