Is it safe to safe to disable disk caching?

[mahesh]

I was copying 10GB files to a 32GB SD card(using on a SD card reader, connected to USB port) using FILE manager of Ubuntu 22.04. It copied at the speed of ~80Mb and completed in reasonable time. I tried to EJECT the card and it showed to the message to the effect "...do not remove the device...". This dialog when on and on. I did not measure the time but seemed to go on for 5minutes. Seems all the data was kept in cache and took time to write to disk.

I would prefer data consistency over speed. I do not mind waiting for copy to complete for 5minutes more. So rather have OS actually write to disk instead of caching, and taking its own time to actually write to disk..

a) Is there a copy tool that disables caching temporarily?.
OR
b) Should I permanently disable the caching at the disk level by using tool like hdparam?

Which solution is better a or b. Please guide.

Thanks