Hi, I just got a 32 GB flash drive to work with the ZTE Z815 and the Dell Inspiron. I guess I should format it. There's a choice of NTFS, FAT32, which is the default, and exFAT. Also, there is a choice of allocation unit size: default, 8192 bytes, 16 kilobytes, 32, or 64. Which of these should I choose, and why? I should probably use Quick Format instead of MS-DOS startup disk.