I heard that you can virtually store unlimited amount of photos on Picasa because they fit the size to the allowed size if you go over it.

Anyway I did CTRL O and moved whole folders that has my iPhone photos into Picasa but it doesn't seem to appear on the Google Plus Photos.

If I upload photos to Google + Photos website, it stays private unless I specify otherwise, correct?

Also the storage is unlimited, correct? As long as you upload iPhone pictures, since iPhone pictures are usually within the compass of the size limit, and even if not, it is re-sized to fit the size limit, which is big enough?