Okay, got it. So you’re primarily working out of your NAS and are using Amazon as a backup repository.
We’ll be coming out with a backup feature sometime in the near future which you could use with an external drive such as a NAS. This feature would still require the use your computer as an intermediary. So it would only backup while your computer was connected to the NAS and the internet. But it would do the backup intelligently in the background–we detect what’s already been uploaded so we wouldn’t repeat that work.
Other ideas (probably less desirable) include purchasing other storage such as a newer Synology device which can support their Cloud Sync app. Or the new Seagate Duet which is a 1TB device which can do the same. These options are complementary to using both Amazon Drive and odrive together. But since you’ve already dumped the money into hardware already, this is probably less appealing.
A final thought I can offer is to consider dumping the NAS altogether. I have a NAS and I love it because I bought it back when storage solutions still weren’t exactly that great. If you use odrive to migrate your photos to the cloud in batches (confirm each batch made it up to the cloud so you feel safe about it) and then just stopped using your NAS altogether, that might actually be better.
I know it’s hard. I still have a small footprint of stuff on my NAS. But I find that I really do worry less about all of the remaining data I’ve already been able to migrate to the cloud.