Data Transfers · Setting up a transfer
Why does the cloud picker say “No accounts or connected devices”?
Short answer: No cloud account is connected yet and no paired device is online. Add an account under More → Connect Accounts…, or open Bridge on the device, then reopen New Transfer.
Storage Studio doesn't have any cloud accounts connected yet, and no paired device is online. The cloud picker only lists places you've already set up.
To fix it, open the More menu → Connect Accounts…, add your account, then come back to New Transfer — the sheet refreshes the list each time it opens. For a device, open Bridge on it and make sure it's connected.
If an account you added earlier is missing, check it still appears in Connect Accounts; if not, add it again.
Related: Cloud accounts · Transfer to a paired device