Sending large amounts of data with transaction


I was wondering - can send big file like large json to somebody
I know I can kind of attach data to account but I want to send something longer then TransferTransaction message allows with transaction.

Is it possible at all?

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I would like to know the same.

Yes, it is possible using Data transaction. But data transaction could put the data only on your account. You can put data on your account which is visible to anyone, so you have to send to the recipient the account and the key under which he could find the data.
Please read the documentation about constraints of Data transaction: