Where does Picasa Store Photo's on my S3?

Hiya,

Could use a little help and am struggling to find answers to these so far.

I have switched to G+ photos and am using Picasa as a somewhat limp upload tool to take my pics from my PC to PicasaWeb/G+. I've turned on Picasa Sync on my S3 and a sync icon appears. However, I can't find where the photo's are stored on my S3. I've searched high and low and can't see which folder they live in. There is around 5 gigs and not enough memory is shown as being used either, so despite it appearing like they are local copies, I can't find them or evidence of them living there. I'd really like to know the folder they live in.

A further question... Is there a nice seamless app that will do an actual real sync automatically between my PC, PicasaWeb/G+ album and then also my phone (though this last bit is theoretically handled by the S3 itself) without me having to launch something manually. The main challenge seems to be between PC and Web as Picasa isn't a real sync it's a one way copy from the PC to the web so the PC photo libraries currently never get synced properly if I make changes elsewhere.

Thanks all, Jamie.