As mentioned already, only you can answer that question. All my mobi's have been converted to azw3 to take advantage of the better font choices than mobi provides. If I get something in an epub format, I leave that until I'm ready to read, then convert to azw3. If it reads fine, I delete the epub.
Edited to add: I converted and then deleted all the mobi files.
Last edited by Tarana; 12-06-2022 at 02:37 PM.
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