however, when I click file>open wallet>, I only see "test" and not the other wallet. In my previous attempt I had first synched, closed bitcoin core, replaced existing wallet.dat with the wallet I am trying to access, and then ran bitcoin core again. The message I received was something along the lines of "Wallet loading failed: Prune: last wallet synchronization goes beyond pruned data. You need to -reindex. (download the whole blockchain again in case of pruned node)" Clicked ok and then ran bitcoin core again. This time I don't recall the message I received but it was a different error and I assumed it was because I did not have enough storage to download the whole blockchain again. Now I will be beginning from scratch on a different device.
Would someone please be able to help me out with a step by step that a third grader could follow? Thank you in advance!!!!!
There is no problem with importing the old wallet.dat file you didn't focus on what error did you get.
"Wallet loading failed: Prune: last wallet synchronization goes beyond pruned data. You need to -reindex. (download the whole blockchain again in case of pruned node)"
This issue comes up if your Bitcore wallet is still set at pruned mode just like the above said you can disable it you need to go to settings>options>Main tab and then under
prune block storage to uncheck it and close then reopen it again.
Another thing if you want to run it at pruned mode then you can run it with -reindex add it on Bitcoin core shortcut. Look at the image below as a reference

Under target at the end, you can see -reindex do the same in your bitcoin core shortcut and click apply and ok then open the bitcoin core again and it should start to reindex.