But to copy 10 GB+ mkv file in a pendrive, whether a 16 GB pendrive will be adequate or I have to purchase a 32 GB pendrive.
How I should format my pendrive so that there will not be any file size restriction while copying mkv file?
16 or 32 is your choice. If you are going to do this regularly, either get a laaaarge pen drive or see if your BD 83 can read external drives. The BD 80, BTW, does not understand anything other than FAT32, so you cannot play MKV files on that. I have not tried the 83.
If you file size is larger than 4GB, you have to format the drive as NTFS.
Cheers