external drive problem

nongthang25

Honorable
Apr 1, 2012
1
0
10,510
Hello, my seagate 1 tb external drive has 3 partition, my first partition I: is over 400 gb, and the other two are K: and L:, 238 gb and 227 gb respectively. both K: and L: are working fine but the bigger partition I: is not working.
when i try to open it, my pc asks me to format it and also displays "I:\ is not accessible
Data error (cyclic redundancy check)". i'm using windows7 OS 64 bit. some days before it was working fine but now i can't access my files in it.
please help me fix it if there is any way. i don't want to loose my important files in it which is more than 300 gb.