Recovering from a Partition Resize

Damn it!!! Just now was trying to resize my partition on my external hardisk. Suddenly my pc went kaput and now my hardisk is unformatted!!!!
Was using EASEUS Partition Manager. Trying to resize the partition. Then create a new one. 300 GB is too big for one partition.


How am I going to recover the data????
I have lots of file in my HD! :(
My ebooks, mv, animes, software, songs.. Aargh!!!!