OpenLager

OpenLager is a "faster openlog" from Team dronin:

It's faster - 4 bit SD interface clocked at 19.2MHz with DMA.

It has buffer memory to ride out times when the SD card is busy-- 125kbytes in current firmware.

It fits in a smaller form factor.

ESD protection (series resistors) on input pins.

And it has a flip-up microSD connector that is better at retaining the card in crashes and hard landings.

OpenLager is easy to use with async serial.