No matter how big is your HD, the bigger it is, the more rubbish files you'll store. You'll have to be careful if you don't want to waste the space of your HD, one of the common problems when you have lots of MBs occupied are the duplicate files.
Hopefully, there are some programs that help you finding and eliminating those duplicate files, and by the way, free space.
Duplicate Cleaner is an useful program that will make you say goodbye to duplicate files definitely.
Its interface is very intuitive, and it's really easy to use. Duplicate Cleaner scans your HD and find all duplicate files. you can choose the kind of results the program will throw: size, name, date or even the content. Then, it will feature a list of duplicate file and you'll be able to eliminate all of them in only one click.
2 reviews 
Comments
As it's a demo, it doesn't find duplicate photos.