
But the solving process is possible to overwrite your original data, resulting in irreparable data loss.

How to fix "File system check exit code is 8" error on external hard drive? Step 1: Back up dataįortunately, the "File system check exit code is 8" error is not difficult to solve. 'File system check exit code is 8' error on Macintosh HD.'File system check exit code is 8' error on external hard drive.How to fix "File system check exit code is 8" error on macOS Catalina/Mojave/High Sierra/Sierra? In this post, we will share six effective solutions. This error has a great chance to occur on both Macintosh HD and external hard drive. The "File system check exit code is 8" error is especially found at the time of system check. I've done some searches, and I haven't found information on this error code. I run First Aid in Disk Utility, but it just failed to fix the trouble and reported an error saying: "The volume could not be verified completely.

Last night, I tried ejecting the disc but got an error that it could not unmount. I have a WD external hard drive used to back up on High Sierra.
