Xperia Tablet Z SGP321 Unable to write file to SD Card

[easoneric]

It should be cased by 4.4.2 SD card design?

Any Solution to fall back to 4.3? or please let me know how to root the XTZ 4.4.2 device. 

The SD Card issue make me mad.

[Uliwooly]

That's a Google issue not Sony's, to downgrade you have 2 options

1. stop by your local Sony Xperia Care

or 

2. use flashtool