Best SanDisk sdcard for PRO 12.2

[hajime_android]

Hello, it turns out that 128GB is out of stock in my city. Now, I have to choose a SanDisk 64GB. Is the Ultra microSDXC UHS-1 Card with Adapter (Class 10, speed up to 30MB/s 200x) the best for this device? I think I read a posting saying that the PRO 12.2 cannot take advantage of the Extreme, Extreme Plus and Extreme Pro. Is that true? If not, please let me know the model number of the recommended one. Thank you.

http://www.sandisk.com/products/memory-cards/microsd/

 

[sinclac]

I just got this one
Sandisk
Class 10 (64GB) microSD, full size SD adaptor and mobile mate USB Reader

 

[muzzy996]

Not true. Extreme plus does run faster. I have one on order and will post a comparison to an ultra when I get it. I know it is faster because i had one in my first note pro and it performed as quickly as internal memory whereas now with the ultra that I am using in my new note pro file transfer to external microsd is slower than to internal memory.

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[hajime_android]

Is this very noticeable? Given that there is a write problem with KK, is it worth to get the Extreme Plus?

 

[muzzy996]

Value is subjective man; you're asking someone who basically spent $1500 US on a note pro having lost his first rig in an act of stupidity. Worth it? Definitely for me. I don't like waiting for long file transfers. I'd rather have a 64 gb card that's twice as fast than a 128 gb card.

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[hajime_android]

Thanks. Which one do you recommend?

SanDisk Extreme PLUS microSDHC/microSDXC UHS-I Card SanDisk Extreme PLUS microSDHC/microSDXC UHS-I Card
SanDisk Extreme microSDHC/microSDXC UHS-I Card SanDisk Extreme microSDHC/microSDXC UHS-I Card

 

[muzzy996]

For me write speed is critical. Both of those top out at around 50MB/s so you probably can't go wrong with either.

The one that I've ordered (and had before) is the Extreme Plus 64GB.

 

[muzzy996]

Ok I have to take back this statement: "it performed as quickly as internal memory"

Here's my test results utilizing two types of tests, one for approximately 125 files totalling 1.4GB (digital camera pics from a D7000) and another for a 1.9GB video file again from a D7000 camera. The files were placed on a Sandisk Extreme USB 3.0 64GB flash drive which was inserted into a USB 3.0 port. This served as the source for all test copies to the tablet/microSD cards and the source USB flash drive stayed in the same USB 3.0 slot throughout.

All times are presented in minutes and seconds.

Note Pro Internal Storage

1.9GB video file over USB 3.0: 0:40
1.9GB video file over USB 2.0: 1:24
1.4GB of photos over USB 3.0: 0:40
1.4GB of photos over USB 2.0: 1:07​

Clearly, USB 3.0 transfer speed to internal memory is faster than USB 2.0.

MicroSD - Sandisk Ultra 64GB

1.9GB video file over USB 3.0: 4:42
1.9GB video file over USB 2.0: 4:48
1.4GB of photos over USB 3.0: 4:17
1.4GB of photos over USB 2.0: 4:18

1.9GB video file using USB 3.0 card reader: 4:45 **
1.4GB of photos using USB 3.0 card reader: 4:19 **​

Clearly the write speed to this card is the limiting factor. It made little difference between USB 3.0 and USB 2.0. These measurements are not scientific, I'm merely using a stopwatch here and watching the progress bar on my Windows 7 machine.

MicroSD - Sandisk Extreme Plus 64GB

1.9GB video file over USB 3.0: 2:19
1.9GB video file over USB 2.0: 2:20
1.4GB of photos over USB 3.0: 1:47
1.4GB of photos over USB 2.0: 1:47

1.9GB video file using USB 3.0 card reader: 1:35 **
1.4GB of photos using USB 3.0 card reader: 1:18 **
​

This is where I eat my words. It's not as fast as the internal storage in the tablet, but in my defense it definitely is faster than the Sandisk Ultra which is a Class 10 card. Also note that using a USB 3.0 card reader did give me faster results. I'm not quite sure what's going on there.


So . . . is it worth it to go to an Extreme Plus ? It's subjective once again but for me, spending $75 vs $40 isn't a big deal to get double the speed. If i'm rushing out the door to a meeting and I need to copy a few gigs of data to my device I know what card I'd want in it .. . .

If all you're doing is loading storage up with video files for use during downtime, say movies and TV shows then either card would be fine. If you're pushing data on and off of the card more often though then perhaps the speed will make a difference for you.

** Note: USB 3.0 Card reader was plugged into the PC. This test was to confirm transfer speed to the two different types of MicroSD card themselves without interaction with the tablet at all.

 

[hajime_android]

Thank you very much for the tests. The results could be very useful to all of us. Good job! Why you used a usb 3.0 reader instead of inserting the card directly to the internal sdcard slot? I think the PRO 12.2 only has a usb 3.0 port. Where are the data related to usb 2.0 coming from? It would be very useful to have the data when you use the card inserted into the memory slot.

 

[muzzy996]

The SD Card Reader results are to show transfer to the MicroSD card when it's inserted into an SD Card Reader that's plugged into the PC not the tablet.

Sorry I didn't make that clear. I'll edit my post to mention that.

The USB 2.0 speeds are data transfer when the tablet is plugged into the PC using a USB 2.0 cable. I'm not sure if you're aware but the only difference between a microUSB 3.0 and 2.0 cable is the addition of data conductors in the USB 3.0 cable. Hard to describe but if you look at the ends of the cables the end of the MicroUSB 2.0 cable is identical to one side of the 3.0 one. Charging is accomplished using this edge of the 3.0 cable so charging speed is no different between the two types but the additional conductors for data transfer yield increased transfer speeds on 3.0.

 

[hajime_android]

Sorry I am a bit confused. Where is the test results of using the SD card slot?

 

[muzzy996]

They are the ones without the asterisks.

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[hajime_android]

They are the ones without the asterisks.

Sent from my SM-P900 using Tapatalk

Thanks. But those without the asterisks are either usb 2.0 or usb 3.0. I am looking for data related to the Ultra and Extreme PRO inserted into the sdcard rather than usb slot. Am I missing something?

 

[muzzy996]

I'm not sure where the confusion lies. Hopefully what I describe below will clear things up for you. All of the information is right there with headings and all.

Its broken up to 3 sections:

Section 1 - Note Pro Internal Storage: describes copying either 1.9GB single movie file or 1.4GB worth of photos to the internal memory of the tablet (not MicroSD) . . . utilizing EITHER a USB 3.0 cable connected to the computer, OR a USB 2.0 cable connected to the computer.

Section 2 - Sandisk Ultra 64GB: describes copying either 1.9GB single movie file or 1.4GB worth of photos to Sandisk Ultra 64GB card while its inserted in the tablet . . . utilizing EITHER a USB 3.0 cable connected to the computer, OR a USB 2.0 cable connected to the computer. . .

The card reader results (which are now identified with asterisks) are merely there to show what the file transfer times are IF THE CARD IS IN YOUR COMPUTER as opposed to being in the tablet. I included the card reader results to show you the maximum write speed of the card using the same test . . taking the tablet completely out of the equation. I suppose this is where you're getting confused because you're seeing the phrase "card reader" and thinking that I'm plugging a reader into the USB port of the tablet . . I'm not . . Again the purpose of testing write speed to the microSD cards in a card reader that's plugged into the PC is to set the benchmark for how fast the memory card really is without the tablet even being a factor.


Section 3 is the same thing as section 2 except for the Extreme Plus . . .

Again, all times are WRITE times . . either to the stock internal memory of the tablet or two the microsd card which is either inside the tablet or in an external card reader connected to the PC (no tablet involved).

By reviewing the times you can clearly draw a few conclusions:


1) that if you buy a Sandisk Ultra then the memory is slow enough to completely negate the need for a USB 3.0 cable when copying data to the card from any external source (clearly no matter what cable is used the times are the same) and

2) that the Extreme Plus is about twice as fast as the Ultra for write speed.

3) that the write speed for the tablet's internal memory is faster than the extreme plus which is currently one of the fastest available microSD cards

 

[hajime_android]

I'm not sure where the confusion lies. Hopefully what I describe below will clear things up for you. All of the information is right there with headings and all.

Its broken up to 3 sections:

Section 1 - Note Pro Internal Storage: describes copying either 1.9GB single movie file or 1.4GB worth of photos to the internal memory of the tablet (not MicroSD) . . . utilizing EITHER a USB 3.0 cable connected to the computer, OR a USB 2.0 cable connected to the computer.

Section 2 - Sandisk Ultra 64GB: describes copying either 1.9GB single movie file or 1.4GB worth of photos to Sandisk Ultra 64GB card while its inserted in the tablet . . . utilizing EITHER a USB 3.0 cable connected to the computer, OR a USB 2.0 cable connected to the computer. . .

The card reader results (which are now identified with asterisks) are merely there to show what the file transfer times are IF THE CARD IS IN YOUR COMPUTER as opposed to being in the tablet. I included the card reader results to show you the maximum write speed of the card using the same test . . taking the tablet completely out of the equation. I suppose this is where you're getting confused because you're seeing the phrase "card reader" and thinking that I'm plugging a reader into the USB port of the tablet . . I'm not . . Again the purpose of testing write speed to the microSD cards in a card reader that's plugged into the PC is to set the benchmark for how fast the memory card really is without the tablet even being a factor.


Section 3 is the same thing as section 2 except for the Extreme Plus . . .

Again, all times are WRITE times . . either to the stock internal memory of the tablet or two the microsd card which is either inside the tablet or in an external card reader connected to the PC (no tablet involved).

By reviewing the times you can clearly draw a few conclusions:


1) that if you buy a Sandisk Ultra then the memory is slow enough to completely negate the need for a USB 3.0 cable when copying data to the card from any external source (clearly no matter what cable is used the times are the same) and

2) that the Extreme Plus is about twice as fast as the Ultra for write speed.

3) that the write speed for the tablet's internal memory is faster than the extreme plus which is currently one of the fastest available microSD cards

Thank you very much for the excellent tests!