If you want your data stored effectively forever:
This project aimed to be super-long-term by design
Designed for hundreds or thousands years of storage with free exposition day annually, more days can be ordered at any time.
Storage size is unlimited and counted in Gigabytes, price is as low as $100 for storage of 1GB of data for 1000 years.
Access tokens are simple to use but impossible to forge, they are stored in ledger database with immutable transaction log.
Stored data are capable to self-finance by gaining one more year of storage for every paid exposition day, ordered by the site visistors.