A Microsoft file hosting and synchronization service.
Hi RenaMack,
Welcome to the Microsoft Community.
I'll try to answer some of your questions.
"But what is in my "This PC>Documents" does not seem to be what is in my 'MS 365 Personal Documents'".
Turn on the Documents folder sync at OneDrive Settings > Sync and Backup tab > Manage Backup. Then, the Documents folder in File Explorer will merge with the Documents folder in OneDrive, and all documents will sync to OneDrive. If you wish, turn on the sync for the other folders listed in Manage Backup. All synced folders are located at C>Users>username>OneDrive.
▷ Video: Turn on OneDrive Backup
You may want to turn off folder sync on the PC that does not have vital files. Then, the Desktop, Documents, Pictures, Music, and/or Videos folders in File Explorer will not sync to OneDrive.
If sync keeps re-enabling, you can avoid OneDrive completely by placing folders at C>Users>Username>ManilaFolders. Or you can try keeping the sync OFF at Manage Backup and pray that Microsoft won't grab your files without your permission. Good luck with that.
If you want all files on all three computers to stay in sync, then sync should be enabled on all folders at Manage Backup.
"1. Purchase a thumb drive (done, coming Sunday, August 4, 2024)... 512GB"
You won't be able to sync files on a thumb drive. However, you can move your entire OneDrive folder to an external drive if you lack space on an internal drive.
Install OneDrive on an external drive
"2. Back up Computer 1 This PC>Documents This is vital information."
That location cannot back up to OneDrive. To back up your Documents turn on folder sync at Manage Backup. Your Documents will move to **** this location: **** C>Users>username>OneDrive>Documents.
"3. Back up Computer 2 . The most important info on this computer is my Snagit. I'll back up This PC>Documents"
Turn on Documents folder sync at Manage Backup.
Download and install or reinstall Microsoft 365 or Office ...
I hope this answers some of your questions. I know I haven't covered everything so feel free to post back here.
Best wishes,
Craig