Pen drive vs External hard disk

I'm still considering on buying a 2GB Pen drive or an external hard disk. The 2GB Pen drive is RM60++ and and external hardisk of 80GB is RM180. Nowadays, seems that 2GB storage is not enought as nowadays we can get movies, drama from the internet. One episode will be like 700MB++, which a CD is unable to store it too. So thats why we start to have DVD's that are 4.7GB.

Types of storage:

5.25-inch floppy - Used during Primary 5-6, Secondary school Form 1-2
Computer is very new in the market. At that time, we are using this only - big, flat, thin disk which is easy get bend.

3-inch compact floppy disk- Used during Secondary school Form 3-5, Collage Year 1 and 2
We always use this to do our programming work for assignments. To copy Word documents from friends PC to my PC, all using this disk.

Compat Disk (CD) - Used during Collage until now
For bigger files, we start to burn them into CD's. Html assignments that got alot of images file, we starting to burn files onto CDs. Buring movie, concert, drama into CD for personal use. Start backuping files on CD. Start buring digital images on CD.

Pendrive - Used during Year 4 Colleage until now
Starting to gain popularity during our last year in Collage. But that time, storage is very little. A friend brought a 128MB Pendrive for RM160 for 5 years warrenty. Now all pendrive almost have 5 years warrenty for FREE. And the minimum storage people will buy will be starting from 512MB, 1GB, 2GB, 4GB, 8GB. Remember last time I have a FREE 64MB pen drive which can only storage 5-6 songs. Haha~

DVD - Used during working
Movies, animation are download from the internet. One movie usually takes up 700MB++, which we cannot store at a CD. No choice to buy DVD to burn those nice movie for storage. But 4 years back, when starting to have DVD, one of my anime friend start to buy DVD to burn all his anime, he say save space. Really save up alot space. One HK movie of 30 episode can be storage at 4 DVD, rather then 30 CD's.

External Hard disk - Haven't use before
Pendrive seems not enough for me nowadays, movie stand up alot of space. Nowadays student in collages used either Pendrive or external hardisk. I can't see anyone using that 3-inch compact floppy disk any more. I guess its out dated.