Balena Etcher Wont Recognize My Drive Partition As One

Hello, I have an issue, Balena wont recognize my drive partition as one in its own specific category, so I cant flash my image without erasing all the data on one of my drives.

Here is pictures of the issue. What do you suggest that I do to fix this?

The drive partition in the picture that I made/want to use for the image file is :K, I dont want to include the D:\ drive.

Etcher flashes drives, not partitions. There is no way to flash a partition with Etcher.
You could do that with dd for example but that wouldn’t make much sense as you would flash a complete disk image (including a partition table) to a partition.
Your computer wouldn’t be able to boot from that, it would see a partition table where it would expect to see a partition.