How long should I keep backups?

[Kania]

I hope that I could really catch up or give you good advice on your problem, but I think you can store unlimited data on your google account if I am not mistaken, like pictures and blog draft. You can use it also as your back up, so that you computer hard drive will have more space again. And if you are familiar with Zipped files you can download it also online to reduce the size of your files and combine it in a single Zip folder.

Do you mean I can store them automatically from my hosting to Google or do you mean that I have to upload them myself?