Can't upload a .gif with a specific name

[Anke]

Btw, to upload multiple file to the assets:

Designer → Media / assets

How do I upload files to the assets (Media)

How to add / delete multiple files (images) to the assets (EDIT: AIA max 30MB) with 7-Zip or winRAR:

This is easier and quicker and AdBlock doesn't matter.
Note: The maximum aia size is now 30 MB.