Interesting idea, but the blockchain could be huge quite quickly. Are there any easy method to upload or read the data?
agree, would be cool to have an easy to use attach-function
Tools will be build around the original client.
This could be awesome, and yes the blockchain can be big, but guys we are on the BIG DATA era. and nowadays 2TB and 3TB disks are pretty common.
Attach-function (bash script) can be taken from OP post, and simple QT frontend app can be compiled for this purpose
I can do that, but now I'm leaving my home computer... maybe anyone other helps? It's REALLY simple, you knowAnd yes, just to me this coin seems more useful than XPM in common sense (sorry SunnyKing
), because there is much more people who need some info stored in decentralized storage than people who need prime numbers 
thats why i was asking ....
I imagine this could be put to lots of uses. 
Seriously, it can be a great foundation for saving info and motivating people to support the network. The only problem is big blockchain, but it could be really stored on servers (hosted by some users), and other users won't hold the whole blockchain on their local computers.