Let's say I find a card I like and download the preview. What happens to previews of cards that you don't buy? Do they stay on your hard drive forever, or do they get replaced as you go?

The app never deletes any of the animation files, which are located in the 'models' folder.
They will stay there even if you disable previews.
They stay where they were downloaded, in case the app has any reason to be playing them. This makes playing much quicker.

Previews take up very little space compared to one full card.
I just checked card e2033 (Kristy Sea).
This card has a total of 800 MB at 720p. Only 30 MB of previews.
Of course a larger resolution will take up more space.

That's what I wanted to know. Thank you for being so helpful!

welcome

To Add to above,
The App does have a built in Size limit for the Previews, and once this Limit has been reached, Older previews are automatically Deleted.

This size limit used to be 20GB of space.
There was a registry setting you could Add to Increase this built in default limit.

See this Post.

https://www.istripper.com/forum/thread/40838/1?post=600810

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I have mine set to a very large size of 8TB so that it will never automatically Delete the Preview files.

Select the Branch
HKEY_CURRENT_USER\Software\Totem\vghd\dlm_server
Then in the right Pane
RIGHT CLICK and Select NEW String Value

Rename the New Key, and Give it a value in bytes.
maxUserDefinedPreviewsBuffer = 8796093022208

Repeat for
maxDeletedDemoSize = 8796093022208

In Addition I believe there is a new Key that you can use to specify the GB size.

maxPreviewsBufferGB = 8192

Example Image:
https://www.istripper.com/customdata/forum/2025-01-17/sAEO38kx.png