Prime 4, all drives suddenly disappeared

Hello Denon friends. Can you help me with this issue? Today I turned on my Prime 4 (already updated to 4.1) and then suddenly it’s not recognizing neither my internal ssd nor sd card nor usb media. To be clear, I use version 4.1 for several weeks, without any problem, all my library content is correctly analyzed according to this version, usually everything works great. For performace I use mainly my internal sdd. This happened to me at the first time, never happened before. Tried to turn off and on, it didn’t help. I have tried to switch to computer mode and back to standalone and then suddenly the drives were recognized. But it does not solve possible root cause. Can you tell me what’s going on? Thank you very much. :slightly_smiling_face: