ASUS ROG Zephyrus G14 GA403 storage is full or nearly full

The checks in more detail

Use the Temporary files page to remove Windows Update cleanup, the Recycle Bin and Downloads you no longer need, and turn on Storage Sense to do this automatically. Hibernation and the page file take space as well, and the hibernation file can be turned off if you do not use it. For more space, the G14 has a slot for an additional or larger SSD in some models, but the 2024 G14 has a single M.2 slot, so upgrading means replacing the drive and cloning the old one.

A fast external SSD over USB-C or USB4 gives extra space for games and files, and most game launchers can install onto it, though load times are a little longer than on the internal drive. Cloud storage for photos and documents frees space too. Use a tool such as WinDirStat or the Windows Storage view to find large folders, such as video captures from the GeForce overlay, which can grow into the hundreds of gigabytes. Empty the recovery of old Windows installations after updates with Disk Cleanup. Do not delete system folders. If you plan to replace the drive, back up first and follow ASUS's guide, since opening the case may affect the warranty.

If storage still looks full after cleaning, restart and check. A good routine is a monthly check: open Storage, look at the biggest category, and decide what to move. Keep a folder of installers and ISO files on an external drive, since these are large and rarely needed. If you edit video, point the editing software's cache and render folders to an external drive, as these grow fast and are easy to clear. After a big Windows feature update, run Disk Cleanup as administrator and tick Previous Windows installation to recover tens of gigabytes. Always keep the laptop's recovery partition untouched.