Unable to edit the content of a mounted ext2 image

I have an image (from an Android phone) for which file gave the following info: file vendor-rw.img vendor-rw.img: Linux rev 1.0 ext2 filesystem data, UUID=64d47c8e-6f74-54ea-bbe7-ce29a05c4b04, volume name "vendor" (extents) (large files) (huge files) I can successfully mount image with the following command in Ubuntu 20 x64: sudo mount -o loop,rw -t ext4 vendor-rw.img tmp/ Obviously the image is not sparse but I cannot edit the content of the mounted drive; What is the problem? **Solved**!: The owner of the mounted point was root and I was running operations on the drive (mkdir for example) as non-root user.