There are several.
ES File Explorer. This is a terrfic file manager with the ability to play music, video and photo files that are installed on your computer.
Free. I've been using this one since I got my tab in March. Works great.
BS Player. This is a media player. Plays many video and music file formats. This one can also play files stored on your computer
Two versions: free, with ads. Paid, no ads and some additonal functions.
I used the free version for several months before I bought the paid version. Both also work great.
There are more, but these are the two I have experience with.
Also, did your tab come with an app called AllShare? If so, it can also play files on your computer. I don't use it much, but it seems to work pretty well.
ETA: Your English is fine.