128GB uSD cards

[Brian Stirling]

Brian if you have the card in your note 4, can you please install the app A1 SD bench, and test the card? I'm dying to see if the note 4 takes advantage of the speed of the card.

I'll look into benching it this weekend. I picked it up late Tuesday and transferred 16GB of music in about 20 minutes.


Brian

 

[Muadib]

I'll look into benching it this weekend. I picked it up late Tuesday and transferred 16GB of music in about 20 minutes.


Brian

Cool, thanks!!

 

[StrangerGuy]

Thanks!!! I'm a bit shocked by the write speed. It's slower than my old Samsung card.

Didn't you hear from Google and their SDless paradise lovers that 38MB/s way too slow for things like music and videos.

*sarcasm*

 

[Brian Stirling]

Well for most things just about any uSD card should be adequate, but 4K video is going to eat a ton of data really quick. I believe we're talking 3X-4X the rate for 1080P video and that's about 10GB/hour so we could be talking 40GB/hour -- or about 11MB/sec.

Of course, a storage devices write speed isn't just about raw write speed of a large file/files but also takes into account writing to many smaller files. When I copied my music to the 128GB uSD card last Tuesday I did so with the card installed in the Note4 and I figure the sustained data rate had to be about 13.65MB/sec so if thats representative of the cards write speed then the worst case writing 4K video should be OK.


Brian

 

[Oyeve]

Well for most things just about any uSD card should be adequate, but 4K video is going to eat a ton of data really quick. I believe we're talking 3X-4X the rate for 1080P video and that's about 10GB/hour so we could be talking 40GB/hour -- or about 11MB/sec.

Of course, a storage devices write speed isn't just about raw write speed of a large file/files but also takes into account writing to many smaller files. When I copied my music to the 128GB uSD card last Tuesday I did so with the card installed in the Note4 and I figure the sustained data rate had to be about 13.65MB/sec so if thats representative of the cards write speed then the worst case writing 4K video should be OK.


Brian

15 sec UHD vid took 80 megs.

 

[Brian Stirling]

15 sec UHD vid took 80 megs.

That's about half the data rate I would have imagined. I'll have to shoot some 4K video and see what I get. The type of video you shoot can make a huge difference in data rate with high action pushing at the high end and a stable shot of a black wall at the other end.

Brian

 

[Brian Stirling]

Ran the A1 SD benchmark and it comes out out 12.9MB/sec which is a bit slower than I measured when transferring 16GB of music to it.

I haven't yet done the 4K video test but might do that tomorrow.


Brian