Slow write speeds to microSD on MT300A

boni · 2017-01-30T01:41:47.000Z

Hi, I am having problems writing data to the microSD, with speed up to max 5 Mb/s while connected with lan cable, in wifi android around 2 Mb/s.

The memory is sdxc class 10, tested on pc with avg. 30 Mb/s, so it shouldn’t be bottleneck.

Does anyone have any suggestions? Maybe specific mount options in fstab to optimize speed?

Thank you for your time.

alzhao · 2017-02-01T22:18:27.000Z

Maybe try to change the filesystem format in the MicroSD card. For example use ext4 format.

The speed should be around 10 to 20 mbps

boni · 2017-02-03T02:29:08.000Z

Hi alzhao,

Thank you for your reply, I forgot to mention it in op but the card is indeed formatted ext4, and I have tryed other formats with no luck.

I have also just tried writing to usb drive, results is that speed is no more than 2 Mb/s.

Is this a faulty product?

alzhao · 2017-02-03T11:29:56.000Z

Can you clarify it: Is it 2M Byte/second or 2M bit /second?

if it is 2M Byte/second then it is normal.