Trying to send ADA but only able to send a small portion. Getting the "Not enough funds" message

Hello all,

I was trying to send all my ADA that I have on my new Trezor T to another wallet to do a full recovery check of my seed. I have around 1700 ADA in my Trezor right now, but when I try to send the max amount, I get the “not enough funds” message. It ony allows me to send 770 ADA. What is happening here? I do have ADA staking on, but this will only begin in 19 days or so.

What can I do?