Thanks for your effords on Coolreader!
and at first it seemed to work well; could open the different folders on my device and books stored prefectly in order. But, while connected to pc it did no longer show up in explorer so I could not add or remove any content. After using the exit button (bottom right) it just rebooted and went back to Coolreader menu so no longer to Kobo menu. When I manually tried to reboot trough powerbutton I got a black screen with *critical error, reset to factory defaults* which I'm now doing.
Since I could not find this excact problem here I open a new topic; if I missed it, sorry and please put it in the correct place.
Any suggestions on this? I already updated to newest firmware version before installing Coolreader.
3. Reboot (exit button). Now you are in nickel (kobo software).
Please note: to copy files via USB you should exit from CR menu to Kobo.
Is it possible that the error occured because I connected to pc while still in booklist in Coolreader? I have to add, since I installed 'launcher.png' and disconnected (safely this time) after that it would no longer disconnect but reported back "a problem has occured, could not remove your device" or something along those lines.
I will install Coolreader again tonight and try your suggestion, hopefully after that the problem will be gone!