If you take a lot of photos and share them online, then Google's offer of cheap additional storage space can seem tempting. While Google's plans are pretty good value, there is one hidden limitation you should be aware of when using Picasa's web albums feature.
Google Operating System notes that Picasa has an upper limit of 1,000 files in any given album, and 1,000 albums overall. That means you can't store more than one million photos, even though Google's advertising suggests higher numbers if you purchase huge amounts of storage.
You probably don't have a million photos to share, but I suspect the album limit is more of an issue to consider. If you're a keen photographer, then three albums a week wouldn't be unusual, which would run you over the limit within seven years.
Two additional traps for Aussie players: the offer of a free Wi-Fi SD card doesn't apply if you do buy more storage, and if your ISP counts uploads as well as downloads in your monthly total, getting those pictures up could be costly anyway.
Google's False Advertising [Google Operating System]