Firstly, I have searched but no one else seems to have asked this Q (apologies if I missed it

).
Background: My sis has a Sanyo Xacti HD1000. I set the cradle up to send the 1080i signal via HDMI to her Viera. The other cable into the cradle is the power lead. The third cable is Hard Disk USB cable.
In order to archive any footage to an external hard drive, a few prerequisites were needed:
- The external hard drive will only work if it is powered by it's own power lead....portable ones powered by the BUS apparently don't work
- The hard drive must be formatted FAT32 (up to 2 TB I think?)
- It will only work with 1 partition per drive, so if you have 3 partitions, only 1 will be used by the xacti, the other 2 won't.
- Plug the cradle's usb into the HD and it will be recognised.
- You need to then format the hd from the Xacti in order for it to work correctly?
So:
1:
Check, she has a brand new Maxtor 500Gb external HD with it's own power supply
2:
Check, when I connect up to her mac (Disk Utility) in both Leopard and Tiger, both confirm that it is indeed a FAT32 formatted drive. Plugging into a Vista and XP PC also confirms it's a useable FAT32 drive.
3:
Check, it is not partitioned....one giant (shows up as 465.65Gb) FAT32 drive

.
4: The HD has a mini-USB input but the lead from the cradle was a standard male USB A plug

......but easily fixed with a simple adapter

. However, on plugging it in, I hit a
problem. The xacti doesn't recognise the HD at all

. You should get a menu option that allows you to format the external drive, but it doesn't appear. The manual states that if it doesn't appear, it's because the file system is not compatible with the Xacti......
....What? I have checked the HD on 4 separate OS's all of which confirm it is a perfectly "normal" FAT32 drive

. I have even connected up using the same cables, but the computer's all still seem to recognize it fine (so it isn't a cable issue).
5:
Problem. Without step 4, the Xacti doesn't give me that menu option in the first place, so I can't format the HD from the Xacti

.
I have looked via google and over at the pretty unhelpful Sanyo parent site, (and in the manuals), but cannot seem to find how to get the HD recognised

.
According to Tiger/Leopard/XP/Vista, it is a perfectly functional 500Gb FAT32 drive......but the Xacti is acting as though it has an incompatible file system even though the Xacti will only work with a FAT32 drive.
Oh, I have re-formatted it twice now but keep getting the same problem

.
Can someone please help me? I'm pulling my hair out here

.