@meyerjamesk
This is your problem: "I also tried to switch the ND and TLG files to ND.OLD and TLG.OLD, but this did not work."
You cannot use OneDrive because these types of files are Live Updated as you work. But OneDrive and DropBox and Google drive are "static storage" which means they cannot handle that the QB data file is a Relational database. Word and Excel will load the entire data file into local memory while you work. QB does not Manage the data file like this. Think of the QB connection to the data file as if that is a phone call you cannot put on hold or even set down the phone.
You can investigate QBox; that seems to be the only cloud storage for the relational data file that works for QB.
