You can upload virtually unlimited images and albums as long as you use the default upload option "High Resolution files - Faster upload".
Using this option you can upload virtually unlimited images. This option will resize images to 3500 pixels. These files can print up to poster-size canvases and are more than sufficient for web use. We recommend to upload a test album for you and see it yourself.
If you wish to upload your albums using the "original files" option then you now have 100GB space instead of 10GB. There is no extra charge for this upgrade. If you are using this option then we will let you know once you have used around 85GB space. You can then either start uploading using the default upload option or delete your old albums or you can always get additional space for $0.50 per GB.