This plugin allows you to upload attachments in bulk for the "Website", "Blog", "Photo", "Store"applications.
The upload file must have 4 columns - product ID, name, description, and file link (an example file can be downloaded from the plugin).
product ID - which product, page, or post to upload the attachment to
for blog posts
for pages in the Blog app
for photos
for Photos app pages
for products
for the Store app categories
for Store app pages
for product pages in the Store app