I have recently made the big leap from Windows to an iMac - still learning the delights and foibles! I'm a reasonably keen (but definitely novice) amateur photographer and trying to figure out the best hardware, software and workflow setup for my needs. Would very much welcome thoughts and advice on approach. On the hardware side I have bought the 21" iMac, a 2TB Timecapsule for backup, an Optical Drive and I have a pre-existing 400GB external HDD plugged into the new Mac (as opposed to the Timecapsule network). My preference and working assumption is that I should keep my expanding library of photos on the external hard drive so as not to gum up the Mac. I have recently bought Photoshop Elements and undertook a 1 day introductory course - I like it as an editing tool, especially for RAW format. But I previously used Picassa as the day to day final viewing repository (ie after editing and saving as JPEG) and think I might continue to do so as it seems to offer the easiest way to upload and share photos with friends and family - ie by simply sending a link. It may be my unfamiliarity but iPhoto and Elements Organiser don't seem to offer the opportunity to share as easily. So I am envisaging a workflow that initially dowloads images from camera (Nikon D90) to a temporary folder in Pictures on the main HDD where I can edit them in Elements before saving the finished articles to a new folder in the chronological architecture on the External HDD. I can then add that folder to Picassa. So when viewing in Picassa the computer will reading from the external HDD so I want it to be quick - it also needs to be able to backup to Timecapsule. The current external HDD was used previously on the Windows machine and is formatted in an MS-DOS - Timemachine doesn't currently back that up but I understand I need to reformat to Mac to do so. My two specific issues are: (i) whether I should invest in a new, larger capacity External HDD at this stage - and specifically one with a Thunderbolt connectivity? Will I notice the difference? (ii) Does the workflow I outline seem reasonable, sensible and efficient - or am I making a lot of work for myself and there are better ways of doing things.