If it's code like the OP seems to indicate, publish it on github; many services draw copies of source code from Github, and they themselves once put all code into cold storage for posterity: https://archiveprogram.github.com/arctic-vault/
> Each was packaged as a single TAR file.
> For greater data density and integrity, most data was stored QR-encoded, and compressed.
> A human-readable index and guide found on every reel explains how to recover the data
> The 02/02/2020 snapshot, consisting of 21TB of data, was archived to 186 reels of film by our archive partners Piql and then transported to the Arctic Code Vault, where it resides today.
> Each was packaged as a single TAR file.
> For greater data density and integrity, most data was stored QR-encoded, and compressed.
> A human-readable index and guide found on every reel explains how to recover the data
> The 02/02/2020 snapshot, consisting of 21TB of data, was archived to 186 reels of film by our archive partners Piql and then transported to the Arctic Code Vault, where it resides today.