To store original copy of images has always been a matter of concern. Printing hard copy of images is very much easy but saving them for future is more challenging. Before the digital photography was introduced, people used to keep the negatives of photos safely in case they might need them in future. Inspite of great care and safety, negative quality used to fade out and resulted in bad prints.
Now we don't have to bother in storing such negative. Rather, we are more fascillitated. We can now store our digital images in varoius magnetic storages like floppy disks, zip disks, cassette, etc. Moreover, optical disks like CD, DVD are mostly used to store data and images. We generally store our images in harddisk in computer. We needn't fear about quality being fed. In the mean time, we should also take care that such storage are prevented from scratches and dust otherwise we may suffer from loss of data or damages. It is better to make backup of every image files we work on so to make sure that we are safe from losing them.