I wish to put a 5 mb file and preserve it on the blockchain, I will also pay.

[bri912678]

One of the biggest drawbacks of Bitcoin is the size of the blockchain. If 1000 people also wanted to store a 5 MB file it would add another 5 GB to the already massive blockchain. The OP should consider an alt designed for storage like maidsafe or storj.

[leopard2]

How much child porn is in  this 5 MB file you want to store?

Maybe he is just another Edward Snowden who wants to save some goodies there :-)

Extremely good or bad things could be stored in this fashion. I wonder what would happen if someone stores something really bad (like nuclear secrets) in the blockchain...then we will find out how invincible the blockchain really is.