HDD Syncing software???

AlphaZERO1

Honorable
Sep 23, 2013
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10,510
I have really irritating problem!!!!
I have external HDD which i use as a backup disk for all my media & data content...And whenever i have new data in my PC HDD, then i have to copy all the files and folders which i have changed (which is pain in ass, bcz sometimes i also forget which are the files that i have changed...)

So,is there any software to keep my PC HDD & EXT. HDD in sync with keeping my data same in both the drives.....(plz dont reply RAID-1 as a solution, bcz both the drives have diff. storage space....)

I know its a very stupid ques. , but plz help me with good solution......
 
Solution
free options are robocopy which comes with Windows. its a command line thing.
and Synctoy 2.1 which is a gui you can download from Microsoft.

AlphaZERO1

Honorable
Sep 23, 2013
9
0
10,510

Okkk, i'll try if it works for me.... :)