Step1: Go to the Files tab in a channel.
Step2: Or, if the file is in your OneDrive, go to Files on the left of Teams and select OneDrive.
Step3: Select More options More options button next to the file and then select Move or Copy.
Step4: To move or copy several files at once, select each file by clicking the left side of its row, and then select More options More options button next to one of the selected files.
Step5: In the dialog box that opens, navigate to the folder you want to move or copy the file(s) to and then select Move or Copy.