Originally Posted by SandraMichael

It works with Arc!
According to this thread
http://forum.xda-developers.com/show....php?t=1389359
I have formatted it with EASYUS to FAT32.
SanDisk SDSDQY-064G-U46A Mobile Ultra 6 MicroSDXC 64GB

One small problem with that, according to http://www.androidnz.net/2012/05/sam...-revealed.html

You see while the 64GB micro SDXC cards work in basically every Android device, they generally only work when formatted to Fat32 rather than the SDXC standards native exFAT formatting system (several devices on ICS work with them formatted NTFS now also, but as a general rule Fat32 is the only option). The problem here is that when you use of these cards Fat32 formatted you impose a 4GB file size limit on them, which can be hassle for transferring HD video to your device, and even worse you curtail the stellar read and write speeds available in the SDXC standard. I for one can't wait to format my 64GB card to exFAT for unrestricted use in my S III.

(important bit highlighted)

Figure that this is something to be aware of, although given the price of Sandisk cards seems to have tumbled (33% off retail price locally) I'm wondering whether this'd be a good present for an Arc S owner who really is into music. I was looking at 32GB Class 10 card, but this might be a better deal.

you could try installing a different kernel on the phone
this two seems to be supporting NTFS
http://forum.xda-developers.com/show....php?t=1520654
http://forum.xda-developers.com/show....php?t=1597771

The 64GB Class 6 should be cost around $64.5 - $74.5.

http://www.ebay.com/itm/320885452322
http://www.groupon.my/deals/penang/vector-digital/716065525
http://www.ebay.com/itm/200758653148

I've read somewhere that Class 6 SDXC is faster than Class 10 SDHC, but I saw no official link proving so.

I let these deals pass since my 32GB Class 10 still has lotsa space.

can the UHC-I 64GB work in arc?

yes

Originally Posted by jtdc

The 64GB Class 6 should be cost around $64.5 - $74.5.

http://www.ebay.com/itm/320885452322
http://www.groupon.my/deals/penang/vector-digital/716065525
http://www.ebay.com/itm/200758653148

I've read somewhere that Class 6 SDXC is faster than Class 10 SDHC, but I saw no official link proving so.

I let these deals pass since my 32GB Class 10 still has lotsa space.

I paid AU$73.95 for a 64GB class 10 SDXC on ebay. Patiently waiting for it to arrive in the mail. It's gonna make things a whole lot better.

Originally Posted by vladvertigo

you could try installing a different kernel on the phone
this two seems to be supporting NTFS
http://forum.xda-developers.com/show....php?t=1520654
http://forum.xda-developers.com/show....php?t=1597771

i am afraid that support for ntfs is only for flash drivers not sdcard
i have tried to format my 8gb to ntfs but it only supports fat32..........correct me if i am wrong

Originally Posted by omtay2311995

i am afraid that support for ntfs is only for flash drivers not sdcard
i have tried to format my 8gb to ntfs but it only supports fat32..........correct me if i am wrong

you actually right, i tried dooms kernel and formatted in ntfs, it did not work
but fat32 works fine for me

Originally Posted by X-Droidinary

I paid AU$73.95 for a 64GB class 10 SDXC on ebay. Patiently waiting for it to arrive in the mail. It's gonna make things a whole lot better.

Received my 64GB micro SDXC card a few days ago and couldn't be happier with it.

Originally Posted by vladvertigo

you could try installing a different kernel on the phone
this two seems to be supporting NTFS
http://forum.xda-developers.com/show....php?t=1520654
http://forum.xda-developers.com/show....php?t=1597771

i think what is being discussed here is exFat not NTFS. exFat enables the read/write speeds of SDXC, aside from exceeding the 4GB file size limit.

so, i haven't seen kernel for Arc supporting exFat, or is there any?

for all those who use 64GB on their Arc, just use it as FAT32?