Hi, One of the reasons for moving files stuck at 99% is that the progress bar we see is just a prediction, not accurate most of the time. It will be faster than it actually is. This means that the actual task might still be running at 79 percent or 89 percent, not even close to completion. Other reasons include antivirus software, file caching, out of memory, and computer performance.
For the solution you can apply some manual steps: You can zip the file before transferring, uninstall the unnecessary application from your computer and keep only one antivirus software on your system, scan and remove suspicious virus, turn off thumbnails in file explorer, etc. One more thing in some cases while transferring the file it could be losss. So take a backup of your file, in case you face data loss situation you can try free recovery tools like recuva, stellar data recovery free edition, testdisk etc. Thanks