You can share files and folders with another project directly from the Outgoing tab in the Bridge tool. The shared files and folders will appear in the target project's Files tool.
Navigate to the Bridge tool using the left navigation menu.
Click the Outgoing tab.
Click Share with a project.

Select Files and folders.
Use the search field to search for files or folders by name.
(Optional for folders only) Select Automatically import folder updates into target project to create a folder automation. The target project receives updates when you make updates to the selected folders in the source project. This feature ensures that stakeholders you shared the folders with always have the most updated files automatically.

(For folders only) Include subfolders will be selected by default. All subfolders within the selected folders will be shared. You can deselect this option if you want to only share the parent folders you select.
Select files or folders that you want to share.

Click Review.
(Optional) Enter a title. A title helps you track what is shared in the Outgoing tab in the Bridge tool.
Select a target project.
Review your selected items.
(Optional) Enter a message about the shared files or folders to provide context for the recipients. The message will appear in relevant emails and on the Detail page for this share in the Outgoing tab.
Select Share # items or Share # items with automation as applicable.
An entry will be added to the Outgoing tab. The status will start In Progress and update to Accepted, Partially failed, or Failed once the share is complete. If a share partially fails, you can look into the Detail page to see which items failed to share and why. See Troubleshooting Bridge Failures for more information.