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,
PlayStation Portable (PSP) 6.61 firmware download
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Updating The PSP System Software to 6.60 / 6.61 - pspunk
How To Update Any PSP To Official 6.61 In 2018! - YouTube
PSP update: 6.61, firmware, PlayStation
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PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
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Tutorial] Install PSP 6.61 Pro-C Infinity Custom Firmware | GBAtemp.net - The Independent Video Game Community
PSP Firmware Update 6.61 Goes Live, is Mandatory
Easy Method - PSP How to install PSP 6.61 Pro C2 and if not showing games list on your psp but first download the file�- http://youtu.be/w4xFduw8cdw 6.61 Pro C2 Download- http://www.mediafire.com/?zd268rwbc5sui2e/ DarkSpeed
Why do so many people prefer 6.60>6.61? : r/PSP
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net