# Handling Large Files If you were to inscribe files larger than 10MB (at the time of writing this) the transaction would generally not be accepted by miners. To work around this, a large data file can be spread across multiple transactions. We can achieve this using the BCAT protocol. BCAT lists, in order, the transaction ids required to assemble the data file. It is a Bitcom protocol that uses the prefix "15DHFxWZJT58f9nhyGnsRBqrgwK4W6h4Up". You can find more information about BCAT protocol [here](https://bcat.bico.media/). While you cannot add the bcat data directly into the inscription fields (since ordinals protocol does not support concatenating external transactions), you can inscribe a thumbnail as the ordinal image, and attach the video using BCAT in OP\_RETURN as follows. TODO: Update with info from collection definition inscription (same structure) ```bash 1SAT_P2PKH OP_RETURN tx2 tx3 tx4... ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.1satordinals.com/handling-large-files.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.