If there are shared folders on your network, and you need to access them from your Chromebook, there's a very easy method of doing so that doesn't involve installing third-party apps.
More helpful:
https://www.xda-developers.com/how-sideload-apps-chromebook/
Sometimes, an Android app that you want to install on your Chromebook may simply not be available on the Google Play Store. This could be either because it's incompatible, or because the app's developer has tagged it as such due to the experience on your device not being exactly how they prefer to present it....
[probably have to set up a Google profile on the Chromebook to log in and enable Android apps, but could you install the apps and use them under the guest login?]
Not that clear, what exactly is encrypted and how to tell.
MrChromebox.tech : Custom coreboot firmware and firmware utilities for your Chromebook/Chromebox
To install full EFI on a Toshiba, a "jumper" screw has to be removed to disable write-protect.
https://www.reddit.com/r/chromeos/comments/2ljid3/how_to_disable_writeprotect_on_toshiba_chromebook/
https://www.youtube.com/watch?v=JcZ711cxKdA
Find out how to enable Secure DNS / HTTPS-over-DNS in modern web browsers to improve privacy and security while using the web browser.
This could beat even some of Google's features.
Best way to install a chrome browser in Ubuntu!
Google says to just use Pack instead of having to hack it.
Can Google Authenticator on a phone require or unlock with an NFC key at all?