How much is the USDT transfer fee?

Could you please elaborate on the transfer fee associated with USDT? I'm particularly interested in understanding the cost involved in transferring USDT, as it seems to be a popular cryptocurrency choice. Could you provide an estimate or a range for this fee? Additionally, are there any factors that could affect the transfer fee, such as the amount being transferred or the time of the transfer? It would be helpful to have a clear understanding of these details before proceeding with a transfer. Thank you for your assistance.