Jestlize mas napr. 5 x film Dr. Divnoláska aneb Jak jsem se naučil nedělat si starosti a mít rád bombu, a vzdy ve stejne kvalite (tj. stejne velikosti) doporucuji http://www.nirsoft.net/utils/search_my_files.html

Duplicate Search Mode
Starting from version 1.35, SearchMyFiles also allows you to search duplicate files on your system. In order to use this feature, simply change the search mode in the 'Search Options' window to 'Duplicates Search'