If you think you can only have extra file storage on your computer you are wrong. You can also now do it on your phone
Dropbox is a free service that lets you bring all your photos, docs, and videos anywhere. After you install it on your computer, any file you save to your Dropbox will automatically save to any other computer you want and any of your android devices.
Files Anywhere makes it so you can view, share and manage your remote files from your phone. You can upload your photos and contacts to manage, share or email and fax files wherever you go
SugarSync allows you to get access to your files, photos and music at any moment. You can also instantly back up your photos, share any files from your computer no matter the size and also stream your music collection. When you make changes to you files on your computer, SugarSync will automatically sync it to your computer.