I caught wind of this from Chris Brogan’s 50 Thoughts on Google+, when he wrote, “With a G+ account, you get unlimited photo storage on Picasa. (Flickr feel threatened? FB photos?).”
Weird, I thought. But, a little Googling turned up a confirmation of sorts courtesy of Melanie Pinola over at Lifehacker.
While Picasa Web Albums offers 1GB of free storage for photos and videos, files under certain size limits won’t count towards this free storage limit. If you’re a Google+ user, photos up to 2048 x 2048 pixels and videos up to 15 minutes won’t eat up your storage space. For non-Google+ users, the photo size limit is smaller: 800 x 800 pixels (videos are also under 15 minutes).
If you reach your storage limit and upload images larger than these dimensions to Picasa Web Albums, however, Google will automatically resize them for you so they won’t count towards your free storage limit—so it’s like getting unlimited storage after all.