If you’ve tried everything else but still struggle to keep your Chromecast from running out of storage space, you may want to opt for a more elaborate solution, such as adding external storage. To integrate your Chromecast with external storage, you will need to find a hub that also has a power delivery port.
Because the Chromecast power supply is designed to cover only its intended power requirements, it may not be able to support an additional USB-C hub. If you choose the wrong USB-C hub, you may get a low-power notification, so you might have to go through a trial-and-error process. To prevent this, Google recommends a USB-C charger that can supply 1.5 A/7.5 W or higher.
Then, you can connect a portable storage device, like a USB stick or SD card. You can use a portable storage device as long as it has a USB 2.0 or greater transfer speed. To stay on the safe side, you can opt for a device with at least a USB 3.0 transfer speed.
Once your USB storage device is connected, you will receive a prompt to reformat it. With this, it’s best to make sure you don’t have any important data, such as photos or documents, inside your storage device before proceeding.
Unfortunately, if you’re big on aesthetics and wire management, this solution might keep you from sleeping at night with how messy it’s going to look.