Ok I understand the big pic now. Many ways to skin this cat. U really wanted to backup CST files and u saw OneDrive as a solution bcoz u lost stuff last time u updated. My suggestions / options are as follows for an systematic process : 1. Keep DAS files in DAS default folders including CST files. It is easier to work with them. 2. DAS has a in-built backup tool in the toolbar menu that zips critical config settings including CST and saves to a ZIP file on desktop with current date as part of name. OneDrive I believe backups the Windows Desktop by default. If not use SyncToy to copy zip file to the local OneDrive folder which will auto sync to the cloud OneDrive folder. AND/OR 3. Before u update DAS copy current DAS folder to new folder with same name but append a date, example "....._20211017", I save my DAS like this and am able to run older versions of DAS from these folders. DAS is very very small and does not use much space. I have abt 11 copies of DAS like this right now. With these options u will have a version history which u can pick anyone to revert to if needs require. Hope that helps.

I assume the FirmID is the 4 or 5 characters infront of your login name displayed at bottom right of main DAS interface. I could be wrong but try it. If u are logged in on the computer it will automatically log the computer off and phone will have access. Be careful the last time I tested this it screwed up my DAS windows layout and I just have not tried to test recently. Test in after hours.