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Here is a website that talks about it . Never tried it just noticed it in my wallet dashboard. http://bitcoin.stackexchange.com/questions/32234/how-to-store-30kb-file-using-decentralized-blockchain-data-storage-on-nxt-nxtco
I know SIA and Storj are being build for this but don't know if they are actually functional

Thanks for the link, looks like a bit of a pain in the ass tbh if it gets purged after 2 weeks.. Thx anyway its cool to see nxt still going strong after so long

Edit: Woot first time I won the steemit happy-hour vote lottery :)