How to import a LOT of images into FOLDERS?

I have an existing site, with 10,000+ product images.
They’re organized into folders, with the following structure:

• PRODUCT_IMAGES

• TYPE_A

• PRODUCT_A01

• PRODUCT_A01-001.jpg
• PRODUCT_A01-002.jpg
• PRODUCT_A01-003.jpg
• …
• PRODUCT_A01-054.jpg

• PRODUCT_A02

• PRODUCT_A02-001.jpg
• PRODUCT_A02-002.jpg
• PRODUCT_A02-003.jpg
• …
• PRODUCT_A02-017.jpg

• …
• PRODUCT_A99

• etc

• TYPE B

• PRODUCT_B01

• PRODUCT_B01-001.jpg
• PRODUCT_B01-002.jpg
• PRODUCT_B01-003.jpg
• …
• PRODUCT_B01-022.jpg

• etc

Is there a plugin / add-on / magic spell / whatever, by which I can import these into WordPress ALL AT ONCE, without having to manually upload & re-organize 10,000+ items?

I tried “Add From Server” but it didn’t work. It processed a ton of files, but they don’t show up in Media Library. At all. But if I go into the plugin options, I can browse their folders as if they’re there. So it basically just copied the files & then forgot to mention it to WordPress Media Library. Great, I could have done that with FileZilla myself.

I tried “Media Library Folder” but that only lets me make folders; it doesn’t do anything as far as mass-importing images.

I know there has GOT to be a plugin out there, or a way to do this through MySQL or something. Any advice would be appreciated!