to the sage but simple advice that you have been given!
You need another drive.
Which you put into a disk-enclosure. (Or if you prefer, buy an enclosure with a drive already in it.) This gives you a place to put your data ... and believe me, 200GB is not
a lot anymore.
Let me put it to you this way: at a local Target
(department store...) you can get an external disk drive with a capacity of 1,000 GB
for slightly more than $120 USD.
Of course it will be preformatted with FAT32 or some equally abominable travesty
but you can reformat the thing. (If it's bigger than the drive you've got now, just move the data over, pop open the case of the enclosure (to hell with the 'warranty') and swap the drives. Now, all of your data has been copied and
you have a bigger drive!)
It's all quite easy to do: it's only unnerving the first
time that you do it.