Hi Kathy,
I hope that you’ve already solved the problem.
If file transfer freezes Windows 10 issue happens when you want to transfer data from one drive to another on your PC, from PC to external hard drive or from external hard drive to PC, then you lose your transferred data. In this situation, you need to recover data from your computer or external hard drive. You may need to use MiniTool Power Data Recovery to get your lost data back.
Firstly, you can stop this transferring process and try again:
Step 1: Press Ctrl + Alt + Del at the same time and then choose Task Manager from the pop-out interface.
Step 2: Choose the transferring process and click on End Task button to stop this transferring process.
After the transferring process quits, you can try to transfer data again.
Remote Differential Compression task can take a lot of time and cause congestion. Thus it may lead to this Windows 10 file transfer hangs issue. Please disable this task to have a try.
Step 1: Open Control Panel from your computer and choose Programs from the pop-out window. Then, click on Turn Windows features on or off under Programs and Features option.
Step 2: Find Remote Differential Compression API Support option and uncheck the box next to it.
Step 3: Click OK button to save the changes.