I've been working on managing my library so when my reader comes in the mail tomorrow, I'll have everything set up on my SD card. I've made a bunch of books using Microsoft Word and saved them in rtf. Previously I just had a few of those (and the first several I made I used WordPad, if that makes any difference), and I just dragged and dropped them onto my reader with the USB. There was no opf file at that time. This past week I've made a whole bunch of rtf files and imported them into calibre. All I did in Calibre is give the books an author, tag, and series name. So tonight when I copied all the books onto my card, the folder is full of opf files, as well. Do I need these files, or can I delete them? I looked in the wiki, and saw that they contain the metadata for epub books, so I'm guessing it's the same thing... but since my other files didn't need them, can I just delete these, as well?
Thanks!
