Warriors Orochi 1&2

[Trokinos]

I'm running into a very strange problem with Warrior Orochi 1 , the game basically tells me my memory stick has "insufficient free space" ?
Despite it's obvious there is a lot of gb available on my hard drive (and the game only require a bit less than 900k of space), that's additionally the 1st time i encounter a game telling me that with PPSSPP , all the other games i tested had no such problem.

Currently running ppsspp-v0.9.9.1-1208-gf7f664c-windows-x86 from buildbot

I tried to move my ppsspp directory to C:\ directly in case the path was too long for that rom for whatever reason, but still same problem.

Any solution ?