High Performance Backup  
The
 first time your continuous data protection policy runs, it will perform
 a full backup of your data. After the initial replica, Server Backup 
stores block level deltas, leading to shorter backup windows and reduced
 disk I/O. 
 Easy Disk to Disk Backup 
Each
 backup is a fully recoverable, point- in-time “recovery point”. When 
you need to recover, you point and click on the recovery point you need 
to recover and that's it. 
Store and archive Virtual Full Backup replicas onto any disk based storage, second hard drives, network shares, NAS, CIFS, SAN, ISCSI, etc.
Store and archive Virtual Full Backup replicas onto any disk based storage, second hard drives, network shares, NAS, CIFS, SAN, ISCSI, etc.
 Portable Backup Storage 
With
 Portable Disk Safe® technology, your backups go wherever you need them 
to. Move a Disk Safe to a new location, open it with another Server 
Backup installation or even copy it to a USB drive. 
 MS Volume Shadow Copy 
Microsoft
 Volume Shadow Copy Service is used to produce a point-in-time snapshot 
of disk volumes, delivering protection for locked and open files. 
 Powerful File Excludes 
Browse
 file system and select any combination of files and folders to be 
excluded from your continuous data protection policy. Add advanced rules
 and exclude rules using patterns to exclude only certain file types. 
 Efficient Backup Storage 
Virtual
 Full Backups mean unique disk blocks are only stored one time in your 
backup storage, even across thousands of recovery points. Keep more 
recovery points longer and save space over your existing full or 
incremental backups. 
 Intuitive Web Interface 
In
 addition to policy management and reporting, browse, download, and 
restore files from recovery points using an Explorer-style interface. 
Additionally, users can see the detailed progress of replication and 
restore jobs as they run. 
Industrial Strength Storage 
Archive
 up to 64TB of recovery points per disk. On-disk journaling passes the 
ACID test and recovers automatically from crashes and product failure. 
 Simultaneous Restores 
Never
 wait for a restore job to begin again. Restore even while your policy 
is replicating. Perform multiple file restore jobs simultaneously. 
 Compression 
With
 both QuickLZ and industry standard zlib (Zip), Server Backup Free 
compresses data at the block-level and only stores it once, until it 
changes or is no longer needed. Typical compression ratios are 2:1. 
 Data Retention Policy 
Define
 a replication goal, such as every 15 minutes, every hour, or every 4 
hours. Then manage your storage by defining how many recovery points you
 will retain. Old recovery points are automatically merged and their 
storage is recycled.
| 
Evaluation copies available | 
n/a | 
Yes, free for 14 days | 
| 
Price  | 
Free | 
$20 per VM, $200 per Server | 
Ecco il link: