There is probably a simple answer to what must be the same issue for everyone.
Taking huge numbers of 4MB photos and storing them on my hard-drive will soon mean i have run out of space. Whilst i do plan to buy an external hard-drive to back them all up, there must be some commonly used method(s) to compress these files in a way that whey take up less memory?
can someone let me know how this can best be done? will any of the image quality be lost when i come to re-open the images? any other issues i should be aware of?
I shoot in JPEG at the moment but may occasionally switch to RAW.