Sd.7z.003 Link

: Frequently seen when splitting large system data or "SD card" backups into smaller chunks for easier downloading.

The filename SD.7z.003 suggests you are looking at the third part of a . SD.7z.003

: Place SD.7z.001 , SD.7z.002 , and SD.7z.003 in the same folder . : Frequently seen when splitting large system data

To "make text" or access the content from this file, you must first the full archive. You cannot open part .003 on its own. How to extract the contents SD.7z.003