Sorry, havent much time last week.
i have tryed some things to find the problems.
1. The Temp folder is always full.
i have tryed everything you told
-windows 10 reset (with shift pressed -> Full Reset)
-unmount & mount the drive again
but the folder has about 50 GB, so i need to delete it by hand.
2. the error with the lost drive ( it will be unmount without any error )
i wrote a batch file to sync my nas drive with the online (onedrive) cloud.
but i need to add some pause between the copy process, or cloud mounter will unmount the drive.
i think the problem is, a copy process will copy the file to cloudmounter temp und cloudmounter upload the file in background.
for example, if i copy a 2 GB file to z: (cloudmounter -> Onedrive) the copy process took about 20 seconds,
but my internet isnt fast enought to upload 2 GB in 20 seconds.
can you change the copy process, so windows will show the real time to copy the file to the cloud drive (upload) and not how long the copy process to temp took.
my next problem, if i copy some file and i think the copy is done....because windows is finished copying to temp, cloudmounter copy in background and isnt finished yet.
now i shut down windows (because i think it is finished copying) the files not finished copying to cloud,
so i need to check by hand if every file really copied or not, otherwise i have many 0 byte filed on onedrive, and the game begins again.
After reset, i found some 0 byte files on Onedrive and i checked in my router if any upload traffic happend again, but there is nothing and cloudmounter still do nothing.
The Temp Folder is full of files, and at onedrive there are many 0 byte files.
delete cloudmounter temp folder, search 0 byte files on onedrive, copy again.
sorry for my bad english, but i hope you can understand, i'm from germany and my english is very bad.

my trial is over since a few days, and i havent time next week.
But if you can add me some days to test again i will thank you and will try it again in 1 week, or is there a new trial avaible ?