Create thumbnail or use FM thumbnail

Hello,

I am building a database to store potentially both interactive and static files numbering in the thousands.

I am confused as to whether I should create a dedicated thumbnail container field or to use FM Native thumbnail feature.

What are the pros and cons for each method?

Much of the inputting could be done on WebDirect and I wish to pay attention to performance issues and stability.

Any guidance is much appreciated.

Thank you.