MicroSD 64GB not recognized

[drdecker]

Hi

I've bought a SanDisk 64GB microSD, but my ZU just won't see it at all.

My laptop can read it just fine and I've tied formatting in various formats, exFat, FAT32 etc.

I know it should take a 64GB card ok. I tested it with a 2GB and it sees that ok.

In fact, if I leave the 64GB one in and reboot it, the phone wont even start properly, you get a 'System UI won't start' error.

Any suggestions???

[Alexander1]

Does your SD card work in another phone? I suggest that you try with another 64 GB card in your Xperia Ultra. Preferably from another manufacturer. 

If the problem persists I suggest that you try to repair the phone software using PC Companion: 

http://www.sonymobile.com/update