Binary data writing on SD card

Hello forum!

I am writing binary data on a SD card on Teency 3.5 (but I think the same could be done with other microcontrollers).
I was wondering if there is a way to write data on the SD card without closing the file after the writing is complete (or closing and re-opening after few loops).
I am trying to write data at high frequency (hopefully 2 kHz) and the opening and closing operations are very time-consuming.

Any suggestions?

Thank you very much in advance! :slight_smile:

@all FYI. This has already been posted to the teensy forum.

Pete