I tried installing 6.61 PRO C2 and infinity v2.0.3 on my psp 3001 (following the instructions on the CFW guide of this subreddit) but it just shows corrupted data when I disconnect,
Release: Davee releases Project Infinity - 6.61 Permanent Patch for ME & PRO CFWs - Wololo.net
Tutorial : install 6.61 Pro c2 cfw - YouTube
PSPHACKS 1.02] How To Install 6.61 PRO-C2 using Infinity 2.0.3 Permanent Custom Firmware - YouTube
How to Hack PSP 1000 & 2000 - EASY Tutorial 2020 - Custom Firmware to Run Homebrew - CFW 6.60 PRO C2 - YouTube