Flickr is actually not a bad option. It's been around the longest and Yahoo is actually finally putting some weight behind it. Compared to general file storage

Flickr is actually not a bad option. It's been around the longest and Yahoo is actually finally putting some weight behind it. Compared to general file storage services like Dropbox, Flickr offers 1 TB of space. You don't have to worry about hitting the ceiling on limits. Also, although many people associate Flickr with professional & public photos, it is very easy to make pictures private by default.