So, thanks to Kulfy, I've created a bootable USB burned with Ubuntu. And then, via the terminal, I have successfully copied my file back to its original location by sudo cp.
Also, I want to warn any future reader who wants Windows to write to ext4: Don't Do That. After I used DiskGenius on Windows to delete a file on Ext4, the disk I wrote on become ...
Since woeusb doesn't support UEFI,
Windows2usb is a perfect solution for creating a bootable USB of Windows ISO in Ubuntu. This tool supports BIOS and UEFI (with rufus driver), FAT32 and NTFS.
Simply download the AppImage and make it executable using your file manager or by entering the following commands in a terminal:
chmod +x ./*.AppImage