How long do 'revisions' last?

[kockgunner]

This has been a question I've been wondering for a while. If I have some large pictures and I scale them down in Preview, I can always revert back to a previous version right? So when does Lion throw those revisions away or does it keep the large original version forever? What if I want to save space and actually want to have lower resolutions of some photos only?

 

[MisterMe]

Wow! You should never ever work do this kind of work on your original images. Archive your originals. Work on copies. I would argue that it is a good idea not to reuse the memory cards from your camera. SDHC cards go for about $0.70/GB now. Each card can store several thousand photographs. When one fills up, label it, toss it into a box, and pop-in a new card.

As for saving space, get an external hard drive. Do you have any idea how many photographs you can store on a 2 TB hard drive? I estimate that you can store more than 300 thousand photographs on a 2 TB hard drive. These drives go for $200 or less. This works out to about 1500 photographs/$ of storage.

 

[kockgunner]

Wow! You should never ever work do this kind of work on your original images. Archive your originals. Work on copies. I would argue that it is a good idea not to reuse the memory cards from your camera. SDHC cards go for about $0.70/GB now. Each card can store several thousand photographs. When one fills up, label it, toss it into a box, and pop-in a new card.

As for saving space, get an external hard drive. Do you have any idea how many photographs you can store on a 2 TB hard drive? I estimate that you can store more than 300 thousand photographs on a 2 TB hard drive. These drives go for $200 or less. This works out to about 1500 photographs/$ of storage.

Thanks for the concern I would never modify my originals either, but sometimes I just throw together a poster for a school project and resize images to keep the file size down. It's just been random question of mine.