[rmykhajliw]

By the way. Did anyone try to use a large sd-card as storage ?

I meant 256-512GB. In my logic it must decrease power consumption when keeping the same IO performance as external ssd connected through USB.

[razemio]

I am uncertain if USB can be a bottleneck there, but if I am not mistaken, SSDs offer better (more?) cache. This dramatically reduces time needed for non-sequential read/write operations.

[rmykhajliw]

USB - 30Mbyte/sec theoretically for RPI, but in reality somewhere around 20Mbyte/sec

SD cards - class 10 tested on RPI show the same performance 21-27Mbyte/sec

So the issue mostly in throughput performance of the interface