Hello and thanks!
Sorry for the delay, my PC had a nervous breakdown yesterday.
The storage acceptance can be configured, but for now there is only either you accept anything, or you accept up to twice the size of your file (default).
Also, there is a (configurable) limit where files are auto accepted, under 64Kb with a total size of 16GB.
I'm thinking about other ways of brokering the deal, like high/low bandwidth, size of course and availability but that is work in progress.
But today, for example, if you store your photo collection of 1000 1MB photos, with a redundancy of 10 (default) the median and max storage you'd need would be:
Median: itemsize * redundancy = 1000 * 1MB * 10 = 10 GB
Max: itemsize * redundancy * 2 = 1000 * 1MB * 10 * 2 = 20 GB
BTW;
You can store GB sized files, but it's not very convenient yet (it uses lots of RAM and the app freezes up for a while) and you might not find someone to "trade" with.
And it's not yet battle proven, so I'd keep a backup to be sure. In the future, you just need your links, and if you have lots of links you can just put them in a folder store that on the network too (with a high redundancy!) and keep just one master link for a total backup.
You can sub here for info and of course if you have more questions!
Or just fire away here.
Cheers!