32GB Micro SD Card Slower than 16GB

[Spoonhead98]

Hi, I have an Asus Transformer Book T100 and I wanted to use my SanDisk 32GB UHS Speed Class 1 Micro SD Card however when I copy files onto it (Usually large files) it starts to copy really slow but eventually stops. Comparing this to my 16GB Micro SD card which is only Class 4, it copies way faster. Both cards are SDHC andmade by SanDisk. Why is the 32GB card slower than the 16GB even though the 32GB card is rated faster?
Thanks

 

[broe23]

It depends on what the speed class the 16gb is. SanDisk has the info on their website about this. Secure Digital - Wikipedia, the free encyclopedia

 

[whs]

Yeah right. A Class 1 is really slow. You should really have a Class 10 card. I use that in my T100 and the performance is acceptable - but not more. I have all my user files on it and I also store images on it.

I also use a fast USB3 flash drive. That is a lot faster.

 

[popeye]

A class 1 UHS is supposed to be as fast as a class 10 standard speed SD: https://www.sdcard.org/consumers/speed/

 

[whs]

A class 1 UHS is supposed to be as fast as a class 10 standard speed SD: https://www.sdcard.org/consumers/speed/

But it looks like the OP is using a slow normal Class 1

 

[popeye]

He said UHS, all these stupid cards does get confusing.

 

[whs]

Right, I missed that, sorry.

 

[Spoonhead98]

The 16GB card is Class 4. The 32GB card is UHS-1. The are both formatted with NTFS and the Default allocation size. I do not understand why the 32GB card is slower.

 

[whs]

You can run it thru HD Tune and see what the facts are. HD Tune website

 

[popeye]

Sure it isn't fake? Lot of them out there.

 

[whs]

Sure it isn't fake? Lot of them out there.

HD Tune will reveal the truth.

 

[whs]

I just made the HD Tune test on a Class 10 MicroSD card. Read transfer rate is 10.2MB/sec and access time is 0.85ms. This may serve for comparison.

PS - don't get confused by the funny colors. This is a high contrast theme.

 

[popeye]

Thought I ate a funny brownie.

That speed is spot on for a class 10.