Our encryption technology relies heavily on your directory’s structure. The individual encryption keys to to your files are stored in your tresors. In practice, this means that your files have to be decrypted and encrypted again before you can move them between tresors.
As of now, this action is not supported in Tresorit apps. However, if the tresors are synced to your desktop, you can simply move them in your file manager. This change will sync to Tresorit, then to other collaborator’s computers as well. Alternatively, you can also download the files, then upload them again to Tresorit, this time to another tresor.