Extract varbinary column data in its original format - sql-server-2008-r2

I am using Microsoft SQL Server 2008 R2. I have a varbinary column RelatedData_img in the table Reminderimage. In that column I store Word, Excel files, images (png, bmp or jpg format) or text files etc. Now I want to store data from that column to a disk using command.
I got this command,
"bcp "SELECT RelatedData_img FROM Reminderimage.dbo.Reminderimage" queryout reminder.dat -T -c"
This command creates a "reminder.dat" file which contains all the data of RelatedData_img column. Now I want to extract all the files from that file in its original format (excel, word, jpg etc).
How to extract the reminder.dat file ?
Please help me with this.

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