Hi,

Usbdlm - USB Drive Letter Manager - as far as i tested it can do not much more than the windows administration... i just used it shortly maybe it can do something i did not
see at a first glance.

The Fat32Format - i do not really understand - that is a formatting tool, and i do not want to in any way change the disk SD partitioning nor format, as these are mission-critical
parameters of wich i have no influence - the device demands the SD to be in a certain way - thats why i cloned the original byte-by-byte, to overcome that problem.

Now i have found a solution, i just need to try it - sometimes the most obvious......

With my partition-tool i changed the exFAT from logical to primary, took the SD out off the reader, and inserted again - now windows sees the exFAT in stead of the Fat32 partition

Next i will do my upgrade - change the partition of the exFAT back to logical - and make a test to see if it runs...