How large can transactions be?

Hi, I have a question, I couldn’t find anything about. In the documentation it says, a transaction carries any number of instructions and an instruction carries a general purpose byte array. Is there any limit to these byte arrays? Could I be sending terrabyte transactions over the network? And will those byte arrays be recorded into blocks?

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Roughly 1200 bytes currently.

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Thanks! Do you have any resources where this is explained in more detail? For example which parts of the transactions are recorded onto the blockchain?

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all of it is recorded

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