"and move the .qbw, .ND, .TLG, .sds files and qbw."
You should never Move files like this. The QB file is a relational database and the associated utility files would be Recreated when you do it like this:
Make a Backup, as usual.
Use it to Restore and put this in the New Location. Once you know it is working from the new location, Delete the old files and folders.
"SearchIndex file to a new directory"
The first time you Index the file, that gets created, anyway.
"Do I also move the Quickbooks Letter Templates and QuickBooksAudoDataRecovery directories that are there?"
No. You would avoid trying to manually manage all of this.
And keep in mind the "QB Letter Templates" needs to be Left In The Public folder, since that is from Program installation, not data file creation. If that is from data file creation, in that data file, the first time you create Letters, you see a Folder that includes the name of that Company file in it, and a Copy of those templates is put here, to avoid you Affecting the Templates to function as Templates. Every new company data file that needs Word Templates for Letters will make its own Subfolder and Set of Templates, to avoid you actually losing the originals.
Which is another reason to let the program manage the files and folders.
Make a Backup with Full Verification. Use it to Restore to the new location. Then, only delete those things that are in the old location that were specific to that one company data file by name.
