Was was the process for holding / sending Bitcoin in the extreme early days?

BTC-maxi
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Was was the process for holding / sending Bitcoin in the extreme early days?

Before the days of any hardware signing device what did it look like?

I am assuming it was some kind of software / application made? Did someone have to make this? Did you have to enter a seedphrase every time you wished to send some?

How would someone have sent the very first bitcoin if they wanted to? Like, if Satoshi wanted to immediately send the first Bitcoin right away, how would it actually have been done?

Is it still possible to send it today in the same manner as back then? Is there some software you need to download?

What about those articles of people who have XXXX BTC in a hard drive they threw away? Why can't they just use the seed phrase to recover it?