how to convert gb files to mb files

3:36

5:08

3:14

کوتاه

4:12

10:31

4:31

13:02

کوتاه

11:39

3:20

3:53

7:59

3:53

1:13

2:28

6:39

8:14

1:08

8:49

6:39

8:05

8:13

9:37

6:30

10:18

3:43

9:54

2:58

8:06

7:18

4:55

16:54

6:39

3:54

4:20

28:42

2:50

کوتاه

1:39