How dropbox, Google drive work technically?

[karan_dev]

I want to know how data synchronisation on different devices actually work? If i want to make project on it how should i approach it.

[alderz]

You might want to take a look into partial persistence data structures https://en.m.wikipedia.org/wiki/Persistent_data_structure

The idea is that every change creates a new revision and then you can update the other devices or roll-back previous versions.

[shpaker]

Magic