EncryptPad VS Hazama

> My productivity app for the past 12 years has been a single .txt file

Better if it's encrypted. I use Encryptpad[0] to store such notes.

[0] https://evpo.net/encryptpad/

I would also take the further step of using a text editor that supports encryption, so that even if an attacker can read files from your computer are using the USB stick, it will still be protected. EncryptPad looks like a good easy to use option, personally I use gVIM, but it's a bit technical. EncryptPad uses industry standard GPG encryption, so the files can be read on Mac and Linux can also, if you ever change OS or collaborate with a peer on the project. They have a nice tutorial here.

I use encryptpad (https://evpo.net/encryptpad/). It allows for symmetric encryption on your local machine and comes with a decent text editor. No cloud storage functionality

Encryptpad is exactly like Notepad with encryption.

As someone else mentioned, Cryptomator is a great option for this, and probably easier. Encrypt Pad can work also. These solutions work differently. Cryptomator gives you an encrypted drive where you can store many files, whereas Encrypt Pad will just encrypt a bunch of text. You can then safely save the encrypted file anywhere, such as your email.

You can also use an encrypted notepad, like EncryptPad. This will password protect the text file as well. Then you have the text file password, OneDrive 2FA and Veracrypt protecting your seed phrase. Good to have if you forget to delete your seed phrase file off your PC. It's still protected even in storage.

Would EncryptPad be enough for your needs?

https://evpo.net/encryptpad/

Hazama worked for me.