Transferring AMR files from ESP32 to phone application

[mgsscorr1]

Hello,

I am looking for a method on how to transfer AMR Files over BLE.
Would it be as simple as using a custom GATT services to transmit all the data from the file on the SD card. Would there be a need for any structuring of the data before sending or would that be more on how the app receives the data and stores it?

Thank you,
Steve