Open File Explorer and type %appdata%\Microsoft\teams. Then delete the following files. As a side note, you can move the files to another place to avoid the data loss.

Log out of Teams

a. In Application Cache > Cache folder, delete all files in it.

b. In Blob_storage folder, delete all files.

c. In Cache folder, delete all files.

d. In databases folder, delete all files.

e. In GPUCache folder, delete all files.

f. In IndexedDB folder, delete the .db file.

g. In Local Storage folder, delete all files.

h. In tmp folder, delete all files.