Will this coin have an storage system like Sia's?
yes, it will... you can have a look at the roadmap on the second post here.
Any details of what advantages will it have over Sia's? Sia is cool but is simply a pain in the ass to use their storage.
I don't have the details. I do know that the developer has the file storage working and that it seems to be possible to store files until 2 GB in size.
The Developer is changing the core of the coin atm and is resolving some problems that are appearing with that now. I also know that the whole GUI is going to be changed as we speak, to prepare for the file storage.
2GB max filesize or total in storage?
The coin looks dope af by the way, just invested a few hundreds on it!