I am going to upgrade to Lightroom 4, partly because my latest ultra-compact camera's (Oly XZ-1) raw files are not supported in LR2. Also, I am nearly maxed out on my main HD, and am adding a 2 TB external drive with to archive older image files and free up room on my main drive (images are also backed up on another 1TB drive and a third drive at another location).
Anyway, I was wondering about a couple of things
1. What is the Lightroom-friendly way to move files from their original location, and will I have to re-import all of the ones I've moved?
2. Should I install LR 4 and then move the files, or move the files first?
Any other advice on how to make my life easier here would be appreciated.