Hello ALIF,

You can backup / restore your database to / from share folder, just defining the UNC name on the BACKUP/RESTORE statement.

The BOL said:

If you are using a network server with a Uniform Naming Convention (UNC) name or using a redirected drive letter, specify a device type of disk.

you can try the following:

backup database MyDB

to disk = '\\shareserver\backup\backup.bak'

or

restore database MyDB

from disk = '\\shareserver\backup\backup.bak'

With Regards,