You can use professional data recovery software to rescue your files. By default, this software select all the boot-related partitions for you. Click the second box to select a destination path to store the backup image. Click Advanced and tick Apply repairs automatically. This process in itself took about 45 minutes to an hour.
 
 

Windows 10 File Transfer Stuck at 99%? Fixes Are Here! – EaseUS.Windows 10 upgrade issues – currently stuck at 99% – Microsoft Community

 
Then, you can use a full edition to recover your needed files without limits. Otherwise, the Media folder might be unavailable on your device. Now rename the SoftwareDistribution and Catroot2 folder. Any behavior that is insulting, rude, vulgar, desecrating, or showing disrespect. However, if the period is longer than that, you have to consider that there is a problem with this update process. You can easily fix the “Window 10 upgrade stuck” error with given windows 10 download stuck at 99 free below. Press the Enter key after each command:.

Windows 10 Update Download Stuck at 99% – How to Fix.How to fix the Windows 10 assistant update stuck at 99% – Quora

 
 
If the internet connection is the cause, there should be visible changes after you disable the internet connection.