1. Akeem Duffus Aisha McFarlane Diana Byfield Odeshia Campbell
CDs and DVDs
Akeem Duffus
Aisha McFarlane
Diana Byfield
Odeshia Campbell

3. About CDs
The Compact Disc (also known as a CD) is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage (CD-ROM), write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Discs (VCD), Super Video Compact Discs (SVCD),

4. DVDs

5. About DVDs
A DVD (Digital Versatile Disc) is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in DVDs offer higher storage capacity than Compact Discs while having the same dimensions

6. Different types of DVDs
A digital video disc (DVD), also known as a digital versatile disc, is an optical disc that stores data and video. Optical discs are circular discs that are read and translated by lasers. There are several types and formats, but most DVDs fall into one of three main categories: read-only, writable, and erasable. It is important to understand the difference between the formats because they are not interchangeable, and each type will only be compatible with specific disc drives.

7. Advantages of CDS & DVDS
- It does not backup items which did not change since last backup. This can lead to big time profits, making backups with short time interval (daily or less) possible. The bigger your files the more time you can win. - It cleans (removes) those items in the backup, which were cleaned in the source. - Easy to find back a file in the backup using Windows Explorer, as file and directory structure in backup is similar to the source. -

8. - It can backup to several kinds of drives like Zip, Yazz and (with the help of external software) even to CDs and DVDs. - You can select both files as directories as source items - Copy from several source drives to one disk possible. Eg backup from c:\documents and d:\documents to e:\.

9. - Nesting protection included to avoid backups with infinite duration
- Nesting protection included to avoid backups with infinite duration. - Special write protection included to avoid writing to other than specified drive. - You can make as many backup jobs (projects) as you want. - Empty space on backup disks can still be used for other goals than "SmartDirCopies". -

10. - Report functions help you see what happens during backup
- Report functions help you see what happens during backup. - Built-in protection against errors concerning incompatibily with CDs. - The built-in 24h timer can help you automize your backups. - Updating a backup by re-running a project goes very fast. - Very advanced users (system people...) can learn from the desktop functionalities in order to get things even more automized.

11. Disadvantages of CDS & DVDS
 There are limitations to the unregistered version. Up to about 5 items and a total of about 50MB selected size per normal project are allowed. Synchronized projects contain only 1 item in both unregistered and registered version; the unregistered version has a limit of about 20MB for these synchronizations. To get rid of this limitations go to the registration section. Registered version allows more than 1000 items and more than 1 billion GB for each project.

12. - Impossible to spread one backup job over several disks
- Impossible to spread one backup job over several disks. You must make several backup jobs to solve this problem. - The full 100% of a backup disk won't be used. At least take into account a loss of some percents. - Writing to CDs/DVDs requires the right CD-software like DirectCD, not included in this program.

13. - If source items are selected which are system, hidden, or readonly files or directories, then they will all become normal, viewable and writable work files in the backup. If you restore such files you must restore manually these attributes if you feel it is necessary. - Some external programs can possibly avoid read access to some work files. If so, then close file and/or the program.

14. End of our Presentation