Acronis True Image 2020: tib and tibx backup format usage

When does Acronis True Image 2020 create .tib and when .tibx?

Backup format is automatically chosen according to the following rules and cannot be set by the end user:

.tibx (new format)

New backups of the following types are created in .tibx format:

• Entire PC
• Entire Mac
• Disks and partitions (both PC and Mac)

except for: