Does the system save thumbnails when exploring sandbox content?

[bingmatv]

Exploring sandbox content seemingly uses un-sandboxed file explorer, if it's true, does the un-sandboxed file explorer save thumbnails when looking at the content in a sandbox?

[offhub]

Yes, since it does not run in a sandbox, thumbnail data will be saved to thumbnail database files on the host machine.

[bingmatv]

I suggest to prevent the host from saving thumbnails and search index for sandbox content, especially for Solid-State Drive. Since SSD TRIM command erases the space after a system deletes a file, it should trigger TRIM command after emptying a sandbox, to get the benefit of SSD TRIM command, I suggest to prevent the host from saving thumbnails and search index for sandbox content. Windows offers a feature "search index" to improve performance when searching files.