Use Windows File Explorer and look in the 20Data folder...are all the files in there? If they are, but you just cant see them, try reading this thread.

https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/re-the-files-that-i-ve-...

This person was having trouble getting files to show up on Homebase, I see their last comment says they used Reset View and the missing files appeared...Im not sure where that choice is though