[Lancer]

Library existed on 2TB usb3 drive J: (win 7 x64)
Added 2nd 3TB usb drive somehow mucked up drive lettering
i.e. not in sequence J dissappeared entirely
H: and I: now exist
H: has folder 1Cal, containing all books/folders/metadata, graphics etc

But on start up of latest Calibre, cannot access that folder
no metadata_db_prefs_backup.json and metadata.db files in there now

Tried a few things after searching here last one was
lib maint/restore to folder with all data in
told folder not empty.

Cannot access my data as lib so next step anyone?

Thank you