INTERACT FORUM

Devices => Androids and other portables => Topic started by: JustinChase on March 23, 2018, 10:01:53 am

Title: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: JustinChase on March 23, 2018, 10:01:53 am

I'm seeing about 9-10MB/sec to move ~2800 songs (~55GB) to the SD card.  I have it connected to a USB 3 port on the motherboard with USB-A to USB-C cable.

I expected higher speeds, and can't find any protocol which has a 9-10 MB cap, so I'm not sure what the bottleneck is.

What speeds do others see, and how might I increase my speeds from here?

Title: Re: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: Hendrik on March 23, 2018, 10:44:41 am

A Class 10 SD card guarantees you a write speed of 10MB/sec, so its probably fine. If it would be significantly faster, they would've classified it using one of the faster profiles.

Title: Re: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: JustinChase on March 23, 2018, 10:49:26 am

I bought a good one, Samsung 128GB 100MB/s (U3) MicroSD EVO Select Memory Card with Adapter (MB-ME128GA/AM)

Up to 100MB/s & 90MB/s read & write speeds respectively; Class 10 UHS 3

So I was expecting more.  Wonder if it's my phone hardware, or something else?

Title: Re: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: millst on March 23, 2018, 11:28:20 am

The key words there are "up to." As in, optimal conditions when everything goes perfect...not the normal use cases. I have a couple of the smaller Selects and they're nothing special. They're supposedly equivalent to the Plus versions, but that's not true.

You can copy a single huge file to the drive and then copy it back to get an idea of its sequential performance. Even better, use some benchmarking software like CrystalDiskMark. Those methods will take MC out of the equation. Try a different card reader to take the phone out of the equation.

Also, beware there are lots of fakes out there for Samsung cards.

-tm

Title: Re: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: JustinChase on March 23, 2018, 11:36:35 am

Oh, I understand "up to", but this is 12% of that, so I feel like it's not the card.  Maybe it is a fake, bought from Amazon.  I'm downloading CrystalDiskInfo 7.6.0 now.  I'll run it when the handheld sync finishes.

Thanks for the help!

Title: Re: Syncing to HTC11's Class 10 SD card is not as fast as I'd hoped
Post by: Hendrik on March 23, 2018, 11:58:46 am

an Class U3 card has a minimum guaranteed write speed of 30MB/s. However maybe the phone is limiting, who knows.