Using the Cloud not for backup but for sync only

I like the idea to shoot pictures with the phone and then use the cloud to sync them with the main pc at home. The smallest package for 12€ provides 20 GB of storage, plenty of space for walking around until I reach the next WIFI spot to sync the pictures with home.

Now I stumbled upon an FAQ entry that states that "once the 20 GB are reached, the sync feature will stop working".

Before I have to spend double the money to upgrade to 1 TB, I am sure there must be a way to flush the cloud after syncing with the desktop pc? I don't intend to use the cloud as a backup for all my photos. That's what the PC and the home NAS is for.

So, in other words, what kind of control does one have over the cloud storage, the sync feature, any kind of purging etc.

Has anybody any expierence witht that?

Thanks.