What sort of write speeds should I expect from a modern SDXC card in my CCR1009-8G-1S-1S+?

Hardware MikroTik hardware general
1

It is silly slow, like only around 2mbit/s. I am directly connected to the CCR at gigabit speed. Is the SD controller just really really slow?

2

How are you using the SD card? Over network using CIFS? CIFS server is known to be slow in ROS, RB device is not intended to replace NAS device.

3

CIFS can’t even write at all. I am using FTP.

4

I would guess that you will get a couple of 100kB/s out if it. It’s simply not designed to be used as mass storage.