Sudden memory drain?

[LadySaat]

I have Sar's 3.5 pr6, with not many programs installed to memory, almost all installed to my storage card. I have like WA2 and PB on phone, idtransfer, audio gateway, and I think Resco Radio on the phone? The rest is on the card. I will have to hard reset and unlock the ext rom and learn how to install stuff to there too I guess. Plus I had to install MSVC 1.6 to my phone as it wouldn't work by copying the old exe over, and I cannot find the 1.6 exe in my phone. MSVC is already in the ROM tho, but that was months ago...

This morning the phone is acting creepy and I plug it in to desktop, and it says 2.21MB left in memory? The IE cache/temp folder is clear, I have no pics/vids on the phone, and all emails and texts are erased too (I did those BTW to see if they were what was hogging space)

Any ideas why the sudden memory loss?