MobileRead Forums - View Single Post - How do I know which file was the original between epub and mobi?

moredrowsy · 09-16-2016, 02:05 PM

@Lily7

If you really want to know if your mobi files are the original files (from amazon), then check if the mobi files have the original MOBI-ASIN identifier. Original mobi files will have a 10 letter/number combination (ie, B01B173GA6). Calibre converted mobi files (epub -> mobi or mobi -> mobi) will have a long obscure MOBI-ASIN id like cd29fa12-c4d2-4ca1-96a6-d2ad08d6fee2. You can check the mobi-asin id using kindle unpack and check the content.opf that it extracts.

Or, you can go to your calibre library folder, ctrl+find *.mobi. Select all of it of the .mobi files in the search results and drag/drop to a new calibre library. Check if any has the original mobi-asin id or not and then you'll know which titles are the originals.

09-16-2016, 02:05 PM	#12
moredrowsy Connoisseur Posts: 69 Karma: 10 Join Date: Aug 2016 Device: Kindle Paperwhite 3	@Lily7 If you really want to know if your mobi files are the original files (from amazon), then check if the mobi files have the original MOBI-ASIN identifier. Original mobi files will have a 10 letter/number combination (ie, B01B173GA6). Calibre converted mobi files (epub -> mobi or mobi -> mobi) will have a long obscure MOBI-ASIN id like cd29fa12-c4d2-4ca1-96a6-d2ad08d6fee2. You can check the mobi-asin id using kindle unpack and check the content.opf that it extracts. Or, you can go to your calibre library folder, ctrl+find .mobi. Select all of it of the .mobi files in the search results and drag/drop to a new calibre library. Check if any has the original mobi-asin id or not and then you'll know which titles are the originals. Last edited by moredrowsy; 09-16-2016 at 02:12 PM.*