Sd.7z.003 -

: Place SD.7z.001 , SD.7z.002 , and SD.7z.003 in the same folder .

: Use a program like 7-Zip or WinZip to open only the .001 file. SD.7z.003

7 Easy Ways to Open 7z Files: WinZip, 7-Zip, & More - wikiHow : Place SD

The filename SD.7z.003 suggests you are looking at the third part of a . : Place SD.7z.001

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

: The software will automatically find the other parts and combine them into the original file or folder.

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