Hi Wai Wai
The way you use your disc will depend on: your drive (trademark, model?), your Operating System (XP. Mac OS, Linux), the software you use, the purpose you want DVD-RAM for.
Arachne have already made the impotant remarks.
XP supports FAT 32
Depending on your drive (OEM, Bulk, Retail), you may have got software to work with the disc or not.
Panasonic is the probably the "father" of the format and has a driver (RAM-Driver), but now it requires a Pana drive to install.
There are some "flavours" of this driver, one being marketed by BHA, that used to come with LG drives - not anymore, so depends on your model. But there are other manufacturers that use it yet.
This driver can use FAT32, UDF 1.5 and 2.0 (it seems BHA's have also 2.05, but not sure).
With this driver installed, Win98, Win2000 also "see" a FAT32 disc as an extenal HDD, so jusr D&Drop.
Other drives come with Nero (including the last LGs) and use InCD for DVD-RAM.
InCD can format several more flavours of UDF, but you have to look for the purposes.
The advantage of FAT32 is that you don't need packet writting software (a lot of problems caused by them) and work just like a big floppy or HDD, using the OS.
On UDF - Panasonic says 1.5 is for data, 2.0 is optimized for video, and 2.05 maybe for streaming video also.
If you look around (Gloogle can help you) you will find information on the purposes of the several UDF versions, that are not as "Universal" as they should....
Advantage of UDF over FAT32, apart from speed difs, file size limit - FAT32 MAX 2GB.
If you have InCD installed be awere about conflicts with the Pana RAM-Driver.
InCD will allow you D&Drop with USF dormatted discs.
I don't know if the last version can also handle FAT32 the same way.
Linux supports DVD-RAM (native) - you can D&Drop.
Formatted disc MAX around 4.3 GB.
Last point: isn't your Maxell disc pre-formatted? A lot of discs come that way, most of them formatted as UDF 2.0 +