Is it possible to uplaod files to a Teams Channel with Easymorph?
You can upload files to SharePoint and post the link to a Teams Channel. See below:
Your Teams is related to a sharepoint site natively. Using the sharepoint connector you will be able to post files in the Files tab but it will be shared to all Channels. Unless you create a shared or private channel. In these 2 cases the channel has its own sharepoint site and posting to those sites would only post to the corresponding channel.
You should first think about the good type of Channel to choose reading microsoft doc : is it a Classic or private or shared channel that you need.