I am currently keeping a lot of my image files as either RAW (if they wer taken that way) or in 16 bit TIFF (uncompressed) but finding that a 15Mb image file when coverted to uncompressed TIFF is about 4 times larger - 60Mb . At these sizes the images are rapidly draining my storage resources even though I have only just dedicated a Terabyte external HDD just for some of my most recent photography.

I realise that there are compressions available for TIFF but I don't know enough about them to risk subjecting the images to the process. I really do want to maintain a 16 bit quality in the images.

What format do most people keep their images in?

Please note - before you say JPEG, I wont use any compression format that will create a loss of image quality and JPEG does just that. So if its JPEG that you use that fine but no need for a reply.