Thank you a lot for being patient with me :D
dd if=/dev/zero of=1g-testfile bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 4.62269 s, 232 MB/s
This HDD is obviously working fine and much faster than I thought it can. I guess I have to find bottleneck elswhere
Hehe you are awesome 😂