MicroSD card compatibility

[Medwynd]

The only thing listed on the microsoft spec page is that it will take MicroSD cards. Will it accept HD and XC type cards? Are there any capacity limitations?

 

[Guytronic]

Mass memory: 8GB
RAM: 1GB
Maximum memory card size: 128GB
Expandable memory card type: MicroSDXC

 

[FancyFreddy]

I can confirm that the 640 works with Sandisk 64GB sdxc micro cards.

Both the 30mb/s and 48mb/s work just fine in the 640 XL LTE my co-worker just picked up.

 

[Harrie-S]

It will work with SDHC and SDXC.
The difference between HC and XC is that the size of HC is between >2 and 32 GB and the size of XC is 32 GB to 2TB. (And from 32 onwards you can not use FAT32 formatting).
There is no max size for your phone the 128 GB is "just" put in the spec because that is the current max size for microSD cards and SDXC because 128 is bigger than 32 But 200 microSD cards are being developed and there are already 512 GB SD cards.

Side note
- A class 4 card may not work because it is to slow.
-UHS (Ultra High Speed bus) standard is not supported so you will not get 30 or 48 MB/s because the max speed of the HIgh Speed bus in your phone is 25 MB/s.

 

[FancyFreddy]

I kinda thought as much regarding UHS, as most everything with SDXC was topping out at below 30MB/s, even though it reads/formats the total size of the cards.

I've thought about the 128GB cards but it already takes more than long enough to get my 20GB of MP3 loaded. The test will be to see how well it actually grabs 1080p video from the main camera.

It will work with SDHC and SDXC.
The difference between HC and XC is that the size of HC is between >2 and 32 GB and the size of XC is 32 GB to 2TB. (And from 32 onwards you can not use FAT32 formatting).
There is no max size for your phone the 128 GB is "just" put in the spec because that is the current max size for microSD cards and SDXC because 128 is bigger than 32 But 200 microSD cards are being developed and there are already 512 GB SD cards.

Side note
- A class 4 card may not work because it is to slow.
-UHS (Ultra High Speed bus) standard is not supported so you will not get 30 or 48 MB/s because the max speed of the HIgh Speed bus in your phone is 25 MB/s.

 

[jdballard]

UHS (Ultra High Speed bus) standard is not supported so you will not get 30 or 48 MB/s because the max speed of the HIgh Speed bus in your phone is 25 MB/s.

Not supported or won't work? If I have one, will it function but just at lower speeds? Have one in anticipation of getting a 640 and debating if I should return it.

 

[Harrie-S]

Not supported or won't work? If I have one, will it function but just at lower speeds? Have one in anticipation of getting a 640 and debating if I should return it.

The card will work (at lower speeds)because it also supports class 10 standard (High Speed bus).

 

[iHeartBretski]

So if I get a class 10 SD card for my Lumia 640 it will work as normal, but just at the highest speed the phone is built to support? It just wont do the 48/s right?

 

[mdd913]

So if I get a class 10 SD card for my Lumia 640 it will work as normal, but just at the highest speed the phone is built to support? It just wont do the 48/s right?

correct