Hi David. I appreciate your reply and I apologize for not understanding it. I am not as tech savvy as I would like to be.
These are individual files that I have already edited and used on both an iPad and some on my Kobo. I had them on a thumb drive and they were loaded into Calibre from that drive. When I opened Calibre a second time most of them would not load.
I am confused about your reply and I am not certain of what to do with the information that you have shared. And yes, I do have a Mac.
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