When I cleared posts of what you say of, were all members that I cleared just not yours, so you're not the only member to see this, but you are the first,
All the posts I clear are not retrievable as they have been removed permanently, sorry.
If you have records, you can re-upload IF you feel obliged to redo the files, please do.
If files or versions are obsolete please ignore them, these days' software is moving so fast and win10 is gone but me is still good till 2032.
Go figer that out, mmm
With respects to posts disappearing it won't be the last "I originally went through every thread and post back in 2017" then the posts were listed and checked before Deletion, I am very aware of what I do.