Cannot Export Worlds Larger Than 1GB

I have a world i started a long time ago. I use Windows 10 to play Minecraft (Bedrock) and this version has an Export tool (FIGURE 2). I use this tool regularly to make backups of my world. My world recently has grown very large since i went exploring in the end to loot end cities and the overworld to find a woodland mansion. My world size grew to 1GB on my hard drive (FIGURE 1). Since this recent growth, I have not been able to export due to a restriction. This restriction states I am out of space on my storage device and i cannot use export until i clear some space. (FIGURE 3) I know i have plenty of space on my pc because when i go to windows explorer, it shows i have 123GB of free space. I am not "Almost out of data storage space" . 

This is what i believe to be a bug and many in the discord have agreed it is a bug. I did one more test to CONFIRM beyond a shadow of a doubt that this is a bug. 

I went into the files of where minecraft is stored on my pc, Copied the files to a zip file, changed the extension to .mcworld and imported onto my other pc. The EXACT same thing happened with the same restriction on my other pc.

It took me 2.5 years to grow and maintain my 100% survival world. I decided to save you devs some time and here is a link to my world via google drive. Keep in mind this world download is 1GB, it may take a while to download

https://drive.google.com/open?id=10eBJqNHrwnKVhL8E8ZtOFq0lOpZ2bYOc

I Really hope this bug report is helpful and easy to fix.