No, when using the Norton 360 backup, files on the external HDD will not be deleted.
The files stored on the external HDD will not be deleted when using the Norton 360 backup.
If you rewrite your backup files. Then, yes your backup files will be rewrited (they might be the same or they can be different). The best way is to backup your files in another folder. If you are using standard window backup procedure your source files are safe because the windows backup utility just copies your files, but doesn't remove them. If you are using utility which wasn't a standard part of windows then you have to check settings very carefully. Some backup utilities do remove files instead of coping them.
Windows backup. Windows will better protect your files because it knows where all the needed files are for backup. However, Norton is also great for this type of thing.
A document cannot really be saved permanently. If someone decides to delete it, it can be deleted. To prevent this you should backup all your files, documents, photos, and music to an external source; preferably an online backup system.
Symantec Backup is through Norton and comes with a Norton Antivirus subscription. When enabled it allows you to backup your system and files onto disks in case something were to happen to your computer you would still have access to them.
backup
The deleted files are from the MicroSD card, not the R4. You can use some Data Recovery programs, which might be able to recover whatever you deleted, but you are better off copying the files from your computer again (if you have a backup, or can redownload it)
If you've deleted your Windows 8 program files by mistake, you can do a recovery and put it back to factory settings. Make sure you backup your files before doing so.
You should backup your computer every two weeks. Your computer reminds you frequency because you add and delete files often and your computer could crash at anytime. Then those files that you added and deleted won't be in the backup when you get a new computer or fix the one you have.
To put it briefly, the only difference between these two applications is the amount of the online storage space included in package price. Standard Norton 360 3.0 comes with 2GB of online storage you can use to backup your files, whereas Norton 360 Version 3.0 Premier Edition includes 25GB of online space available for your backup data. Files are stored on a remote server at the Symantec datacentre.
Just like recovering the lost files on external hard disk, you can use a program to scan the partition, the location of the deleted folders. You can read this guide,
creating a new volume and recovering the files from a backup source