Yes and no. Let us explain how it works. Media in bundle.social is either:
used - you made a post with it,
unused - you did not make a post with it.
You have a hard limit of 100 pieces of content that are unused, so you can upload the content, and when the time comes, you can make a post with it. There is no limit for used media.
Sometimes, if you have multiple versions of a photo/video, you aren’t sure if the one you uploaded is the correct one. To check the metadata of the content, hover over the content and click the eye icon.