There is no actual week deposited - you basically get a deposit "credit."
All weeks are deeded - I think you mean "fixed" or "floating" week - if it's a true fixed week, meaning you own and can use one specific week only, then they have to deposit that specific week.
True fixed week - automatically reserved for you about 18 mos. before check-in - the date is fixed.
Floating week - you can make a home resort reservation 12-8 mos. before check-in.
What RESORT are you considering? - most do not have true fixed weeks in the Starwood system.