Learn how to create a Shortcut on your iPhone that you can activate with your voice to turn on Do Not Disturb. The Shortcut will then ask you for a number of miniutes and automatically turn off. You can also set it to activate silently as a Home screen icon.
If you want something faster than an external hard drive, and better than a USB Flash drive, you can build an external SSD drive with an SSD and an enclosure. I built a 256GB USB 3.1 external SSD for less than $70 that works great on my Mac. Learn how to build your own.
You can use the Shortcuts app on your iPhone or iPad to create a quick method to shrink an image before sharing it. With this more advanced Shortcut, you can choose a size in pixels or percent, and select the image format and quality.
If you need to open PDF files or just want a decent image editing app that doesn't cost too much or require a subscription, there are plenty of options in the Mac App Store and elsewhere. All of these and 64-bit apps that work with macOS Catalina and beyond. See https://macmost.com/mac-photoshop-alternatives.html for links.