How to test read/write speed of an external USB 3.0 drive

[Portisch]

[S922X-H] Bee-link GS-King X

Yes, please try this speed test of the internal HDD: Be sure test file is removed before and after speed test: rm -rf /var/media/android/test.speed Write speed test: echo 3 > /proc/sys/vm/drop_caches dd if=/dev/zero of=/var/media/android/test.speed bs=1M count=1024 Read test: echo 3 > /proc/sys/vm/drop_caches dd if=/var/media/android/test.speed of=/dev/null bs=1M

Just adjust the HDD label in the commands.