Balena etcher issue

After flashing CL using balena etcher the 64Gigs USB drive becomes invisible to the windows system.

Using Windows disk tool i can see that there’s a USB drive having a 150mb efi system partition and 58gigs of unallocated space!

What’s going on here?

When you flash an image to a USB drive, you get a partition the size of the image you flash, not the total capacity of the hardware. You can re-flash the USB key to retrieve your space after you’ve finished using in to install Clear Linux to your hard drive.