Compression

Acronis True Image may fail to back up an NTFS-compressed partition

Acronis products save backup data in the proprietary TIB format using compression that reduces the amount of storage space needed for backups. Compression is used both in Windows and Linux operating systems and in Acronis Bootable Media.

Effective data compression level and resulting archive size depends on the type of files stored in the backup: even maximum compression cannot significantly reduce the backup size if the backup contains already compressed files, like .jpg, .pdf or .mp3. However, formats such as .doc or .xls will be compressed well.

Acronis Cyber Backup products do not take into account tape hardware compression while calculating space on tape media.