Depending on the types of your transfer, the duration can be from 2-3 business days. The point of our sandbox account is to allow you to test in an environment as close to production as possible without moving real money.
Please note that the transfer will initiate the next business day after the last window cut-off (4:15 pm ET).
Bank to wallet - 2 business days
Bank to bank (same-day ACH) - 2 business days
Bank to bank (standard ACH) - 3 business days
You can refer to this article here to learn more about ACH processing and cutoff-times.