On a Nexus 9, using bookshelf with fbreader, I have copied lots of folders from Calibre on a PC to Books folder. Each folder contains a
metadata.opf file which the bookshelf for some reason considers and shows as a separate book, but when opened it shows nothing.
So I want to delete all these
metadata.opf files, but going in succession to all these folders and deleting them one by one would take ages.
If I could get into the Books folder from the command prompt on the pc I could issue a single shell command to do what I want.
But I don't know how to do it. Windows Explorer shows portable device Nexus 9 connected, I can get inside from Windows Explorer, I can search for all
metadata.opf files in Windows Explorer, and it gives me a long list of these files, but I cannot delete them all - I can delete them one by one but when I select them all and choose delete, a window pops up telling
An unexpected error is keeping you from deleting the file. If you continue to receive this error, you can use the error code to search for help with this problem. Error 0x80004002: No such interface supported
What can I do?