Using "Auto-*" is only used for the proper name of a feature, not to describe an action. For example "Use Auto-delete" could be the name of a feature, but "Auto-delete this file" is awkward and incorrect.
In this context "Trash" and "Temporary" are proper nouns because they refer to specific special system folders, so it makes sense to capitalize them
Using "Auto-*" is only used for the proper name of a feature, not to describe an action. For example "Use Auto-delete" could be the name of a feature, but "Auto-delete this file" is awkward and incorrect.
In this context "Trash" and "Temporary" are proper nouns because they refer to specific special system folders, so it makes sense to capitalize them