The TV on-board storage consists of two parts: Internal Storage and User Accessible Storage.
Internal Storage, also being called System Memory, is used to store the operating system and system files. This part of storage is inaccessible to users.
User Accessible Storage is the space that can accessed and used by the users. It is used to store the apps and user data.
When you check the available storage on your TV, it will only indicate the available storage that is user accessible. Therefore, the available storage will be different from the description in the product page.
To check the storage capacity on the TV, refer to the following.
How to check the amount of storage available on the TV.
Also, if the capacity becomes insufficient due to app installation, you can move downloaded apps to USB memory to increase on-board storage free space.
For detailed instructions, refer to the following.
How to move apps to a USB memory device on Android TV™
*Android TV is a trademark of Google LLC.