How to Update Your PSP to Official 6.61 Firmware (The last Official Update) - YouTube
How To Update Your PSP TO 6.61 Official Firmware in 2021 - YouTube
bruh how do I fix this? (PSP hanging on a blank screen while updating from 6.60 ofw to 6.61 PRO-C) : r/PSP
Lme Psp 6.61 Get File - Colaboratory
Davee's Infinity CFW - Permanent 6.61 CFW on All 3000 & Go Models! | GBAtemp.net - The Independent Video Game Community
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,
ARK PSP - GameBrew
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
PSP 6.61 Firmware Update for Windows - Free Download