External Hard Drive "partial" crash?

Ive been using a 500 gb GDrive mini triple for about 6 months now to store all of my data for school and it has been great, until now. I dont kow exactly what happened, but now "most" of my files are corrupt (the important ones conveniently). I had partitioned the drive into two separate drives. One containing all of my iTunes data, and one containing all of my other data. The iTunes partition seems to be untouched and still works fine. The other partition ("school") had everything organized into about 4 file categories: School, Non-School, Baby(my wife's stuff), Portfolio, and one or two loose documents. All the data was stored in FAT32 format. After using my hard drive on a PC at school yesterday, all of the files on the "School" partition have gone "bad", with the exception of the "Baby" folder. That one and all of its contents are in perfect condition. I should mention that I use bootcamp and my windows partition at home regularly in conjunction with this hard drive as well, with no previous issues. Does anyone have any idea what could have happened here? Ive never heard of anything like this before, and its vitally important for me to be able to recover the data stored on that drive. Finals are in two weeks and everything is on there! any help is greatly appreciated.

This is how they appear in OSX Unfortunately there are many applications used to create different files. Most are .jpg or .psd images created in Photoshop, but there are also Word documents (.Mac), .pdf files, .wire files created in Autodesk Alias Studio, .avi videos, and maybe a couple of MP3s. I tried to run verify disk in disk utility but got the following error: "Disk Utility stopped verifying "SCHOOL" because the following error was encountered: Filesystem verify or repair failed." I then ran repair disk with the following result:
Verify and Repair volume"SCHOOL"
ock (5616244) not correct (7349253)
fix? yes
4676 files, 235176096 KiB free 7349253 clusters)
It looked like something happened but when I open the volume in finder the files look the same and cannot be opened.
Im going to attempt an error check from the windows partition, hopefully I will have better luck over there.
Quick question, if I try to perform a repair on this external disk from disk utility on Mac or a similar process in Windows, will it affect my data? (i.e. erase any data that isnt recovered?) Ive been searching for an answer to this question but I dont know how to ask i guess because my searches yield the answeres to the wrong questions. thanks again.
Message was edited by: muffinpunch

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