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,
PSP GO 6.61 Infinity Permanent CFW (PRO) Full Tutorial! 2017! - YouTube
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Page 11 | Digiex
PlayStation Guide
Downloaded CFW 6.61 PRO-C2 got this message : r/PSP
How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
Tutorial : install 6.61 Pro c2 cfw - YouTube
Silver Sony PSP 2001 6.61 Pro-c Infinity With Games Bundle - Etsy
Tutorial - PSP - 6.61 Infinity Hybrid CFW (Perma Patch for LME & PRO CFW) | Se7enSins Gaming Community
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | Page 2 | GBAtemp.net - The Independent Video Game Community
Update to 6.61 Infinity? : r/PSP
PSP Firmware 6.61 - CFW users finally excluded from using PSN services?! - Wololo.net