Every storage product has a shape.
Most products bury this page or skip it. Here it is up front, because finding out about a ceiling after you have moved three years of files is a genuinely bad afternoon.
100 MB a file
Telegram will only hand a file back if it is under 20 MB, so anything larger is stored as several messages and put back together when you open it. That works, but every part is another round trip - and a big file has to come back through one request before it times out.
What that means
100 MB is where that stops being comfortable, so it is the ceiling, refused in the browser and again on the server. A file under 4 MB still travels as a single message, exactly as before.
Deletes are best-effort
Telegram does not let a bot delete a message older than 48 hours. Newer than that and the message goes when you delete the file; older and Telegram simply refuses.
What that means
The database row always goes, so the file disappears from your drive either way. The original message may survive in the channel, where you can delete it yourself from the Telegram app.
Telegram's rules still apply
This is their infrastructure, reached through their Bot API, under their terms. Rate limits, content policy and availability are all theirs to set and change.
What that means
If they throttle your bot or take issue with what is in the channel, this app has no standing to argue on your behalf. Treat it as your own Telegram account, because that is what it is.
The encryption key is the key
Your bot token is stored encrypted. The key that decrypts it lives in the server environment, never in the database, so a database leak alone does not expose anyone's token.
What that means
The trade is that if that key is lost or rotated, every stored token becomes unreadable and everyone reconnects by pasting their token again. Files are untouched - only the connection has to be redone.
Be honest with yourself
Four reasons not to use this
4K video and big archives
A single 2 GB export is off the table. This is not the tool for it and never will be.
Team collaboration
One account, one drive. No sharing links, no permissions matrix, no comments.
Compliance-bound data
There is no audit trail, no retention policy and no data-processing agreement.
Anything you have one copy of
A good second home for files. It should not be the only home for something irreplaceable.
If none of those is a dealbreaker, ownstorage handles documents, scans, screenshots, notes and photos very comfortably - and it will not send you a bill for doing it.