I use Dropbox for my iOS photo backup only. Then sa computer ko I use a program that transfer new files from my dropbox to my NAS and upload it sa Amazon S3 (just in case mag crash raid 1 NAS ko.

With regards sa speed ng syncing ng dropbox server both sa iOS and Computers ok naman speed, I get the max speed sa pldt mydsl ko pag idle yung network ko and Dropbox lang ang gumagamit.

I use Google Drive for documents