How can I bulk upload images for product import?

File upload via CSV is a nice feature, but how can we delete these files? They do not show under Files.

When changing products images, not deleting these files could result in storing a lot of useless files (100,000-200,000 initial image files after some time could easily become millions).

Doesn’t this big number of images slow down the store?

Is there any native way to delete these csv-imported images?