The legacy format where each incremental backup is usually a separate file.

While this sounds inefficient, it is the only official method certified by Acronis. Do not fall for fake online "converters" that claim to change file extensions—they will corrupt your data.

Select your .tibx file and choose a format like VHD (Microsoft) or VMDK (VMware). 🔍 Key Differences to Remember Convert .tibx to .tib - Acronis Forum

You must have at least one old .tib backup file available.