I spent about 2 months (frustrating months) fooling with the Sony Connect software. It would sync when I didn't want it to and sometime it wouldn't sync at all. Not to mention the lockups.
My solution was to just to use my 505 as another drive and just ignore the Connect software. Transferring file is a lot simpler for me and it is very easy to do. Maybe the software will be more user friendly someday and I'll try it again but it's not worth the aggregation for me!
Maybe not the "best" solution but works for me!