When my application starts, Physical files back-up is taken(auto).
Do you mean that you just copy the database files (mdf and ldf) somewhere for a backup? Do you stop SQL or detach the database to do this?
Could you please guide the kind of Back-up Plan that I can Introduce.
As well as Paul's link, start with SQL Books Online, the section BACKUP DATABASE
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: Discussions on DB performance with occasional diversions into recoverability
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