Problem moving Addresses to right area

Well I moved everything from my T2 to my new T5, no problems as I thought, but then ....

I found that my largest address file 1500+ has ended up, all together in the Unfiled area, is there any way of moving this lot in one, to a new named area, I'm sure there is but I'm blowed if I can find it.
The very last thing I want to have to do is to move them all individually.

Any help with a reminder for this 'old' user would be gratefully received.

All the best,

Tungsten101