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The file name extension indicates the archive type used (.cbz = ZIP). Comic book archive files mainly consist of a series of image files stored as a single archive file.
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MOBI is an older file format and won't support the newest Kindle features for documents." - More info is available here. This change won't affect any MOBI files already in your Kindle library. MOBI) files to your Kindle library using Send to Kindle. " Note: Beginning in late 2022, you'll no longer be able to send MOBI (.AZW. Note: As of 2022, Kindle now supports EPUB formats and the Kindle app has a built-in “Send to Kindle” feature that works on most smartphone devices. It is also possible to view EPUB files on a PC by downloading an appropriate application. If you have an Android device, you can install an app that will let you view EPUB files.
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