TON Storage is a distributed information storage. It was developed as part of TON for Telegram.
The principle of operation is similar to torrents. Information is stored mainly on user devices, the owners of which receive a fee for storing information for a certain time. It was assumed that all other TON services would be able to interact with TON Storage.
In Free TON, the TON Storage service does not function, although it is included in the code. This solution is because the storage itself is not a complete solution for the user.
For the information storage service to work, a database is needed that works on top of such storage and provides the ability to index, search, guarantee the safety of information, etc. The development of such a database is planned in Free TON in the near future.