On doing so, I found I couldn't do so...
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\RMD>format g: /q /fs:fat32
The type of the file system is NTFS.
The new file system is FAT32.
WARNING, ALL DATA ON NON-REMOVABLE DISK
DRIVE G: WILL BE LOST!
Proceed with Format (Y/N)? y
The volume is too big for FAT32.
The solution I used was to find a tool that would perform the format.
Fat32Format by Ridgecrop Consultants is as good as any, i.e. it is fast and free.
Warning ALL data on drive 'g' will be lost irretrievably, are you sure
Size : 250GB 488392002 sectors
512 Bytes Per Sector, Cluster size 32768 bytes
Volume ID is 1ee6:304a
32 Reserved Sectors, 59604 Sectors per FAT, 2 fats
7629261 Total clusters
7629260 Free Clusters
Formatting drive g:...
Clearing out 119304 sectors for Reserved sectors, fats and root cluster...
Wrote 61083648 bytes in 2.33 seconds, 25.05 Megabytes/sec
Initialising reserved sectors and FATs...