Maybe, in future, you will do this, please? It can save the disk space and faster the work with files.
32 bit dont need in many cases, and "integer" too.
What are the defaults in Corona EXR autosave now?
The difference of size are about 10 times between manual save in 16 bit and autosave.
And also I saw an error opening EXR in Photoshop CS4, saved by Backburner 2014 (second pic)