Question : Shrink Massive Database?  How to estimate how long it will take?

I have a pretty massive DB.  It's currently at 425,209 MB and growing at about 2G/day (36 million recs/day!).  

There is more space on the server, but I've got to share it with a couple other depts.  Once upon a time I had to go in and fix a big db with a few tables that were about a billion recs each.  I decided I'd just do a quick shrink and reindex those tables and then I'd be able to work more efficiently.  Ooops.  So, 3 days later when it was finished.... I managed to get the job finished and was never hired at that firm again.  :)

This one makes that DB look like a kid's toy.  It is a If I shut this thing down for a full day, well.... it could be bad.  Anyway, before I start shrinking this monster, is there a way to figure out how long it might take?

Answer : Shrink Massive Database?  How to estimate how long it will take?

if you can archive the data i think you can dts the unsude tables to access and then change the extention of the access file as .txt this will make huge difference.