We understand your concern about taking up too much storage space. For incremental and differential backups, all data blocks are compared with the corresponding blocks in the full backup before they are written to the image file to make sure that no duplicates are stored in the image file, so we can be sure that the data blocks written to the image file are the ones that have changed. As to why such a large image file was created, we believe there may be the following reasons:
1. Windows updates changed some of the files;
2. Windows may have defragmented the drive. Usually Windows optimizes and defragments the C: drive on a regular basis, and we think this is the main reason why your computer generates a huge backup image file.
For the disk backup feature, the backup program will divide the entire drive into blocks of specified size, then check whether the data in these blocks have been changed, and if a block has been changed then the data in that block will be written to the backup image file, so if the drive to be backed up performs a defragmentation operation, a very large backup image may be generated.
Regarding the problem you mentioned that WizTree only found about 10 Gigabytes of changed data, we are not familiar with WizTree, but usually these software will only list files whose content has changed, and will not tell you about the files whose location has changed.
In fact, the best way to find out if Hasleo Backup Suite is taking up too much storage space is to compare it to other competitors (e.g. Macrium Reflect), and we'll do some testing.
1. Windows updates changed some of the files;
2. Windows may have defragmented the drive. Usually Windows optimizes and defragments the C: drive on a regular basis, and we think this is the main reason why your computer generates a huge backup image file.
For the disk backup feature, the backup program will divide the entire drive into blocks of specified size, then check whether the data in these blocks have been changed, and if a block has been changed then the data in that block will be written to the backup image file, so if the drive to be backed up performs a defragmentation operation, a very large backup image may be generated.
Regarding the problem you mentioned that WizTree only found about 10 Gigabytes of changed data, we are not familiar with WizTree, but usually these software will only list files whose content has changed, and will not tell you about the files whose location has changed.
In fact, the best way to find out if Hasleo Backup Suite is taking up too much storage space is to compare it to other competitors (e.g. Macrium Reflect), and we'll do some testing.