**System Information**
Operating system: Windows 11
Graphics card: NVIDIA GeForce RTX 2070 Super
**Blender Version**
Broken: 3.2.2
Worked: None
**Short description of error**
.blend file size increases with 'Automatically pack resources' when OpenVDB volume is in scene. But it doesn't show up in the scene if the original VDB files are deleted.
**Exact steps for others to reproduce the error**
1. In an empty scene, {key shift A} to add an object and {nav Volume > Import OpenVDB}
1. Import the attached VDB file
1. Save the file (Note that the file size is something around 800 KB)
1. {nav File > External Data > Pack Resources} or Turn `Automatically pack resources` on
1. Save the blend file (Note that the file size is something around 6.800 KB)
1. Delete original VDB files
1. Revert or Reopen the saved .blend file
1. Although the size is larger, when you open the blend file again, volume object shows nothing.
{F13413732}
9. unpack the volume from the Properties Editor [ `use file from current directory (create if necessary)` option]:
{F13414877}
This will unpack the volume to `//volumes/Cloud_1.VDB`
10. save the file
11. revert the file >> now working again