As I am about to change my sdcard to a 32GB, I am thinking of trying MIUI's a2sd instead of android_secure folder. I had used similar years ago but as they have all improved,I have a question regarding the partition format? All that I have read in forums indicate ext3 partition, can I use ext4 as these days almost everything runs in ext4. Is there a maximum partition size for a2sd? I was thinking of using 2GB.