I store all my photography on Disk D on my PC, Lightroom 5 is installed on Disk C. When I import my photographs into My Library using the Add option should they take up space on Disk C as well as Disk D? They are appearing to do so but I thought they wouldn't using the Add option rather than Move or Copy. Can anyone please advise?
Where is your LR Catalog? If it is on your C Drive, The only additional space on C should be for the information added to the catalog and for the previews, which should be small, unless you are building 1:1 previews, which can be larger and take more space.
Thanks for your reply. My Catalog is on my C Drive so the change in memory must be down to the information and previews, but I will check the preview sizes.