Where to store large files (in Database or in folder)

Hello,

I am curious to know the following:

We are going to develop a website where we need to store large number of files. The file size may be uptp 50 MB. What approach should we follow:

1) We should store files in Database

2) We should have a directory and store all the files in that

3) We should hire a SAN Storage and use this seperate location to store the files.

Please suggest.