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Im assuming you are using vista, and you are trying to backup using the vista sotware?<br />
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Are you by chance using the WD network backup drives?
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Im assuming you are using vista, and you are trying to backup using the vista sotware?

Are you by chance using the WD network backup drives?

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Most likely the issue is that you configured the backup task to use a mapped drive letter.... however, under the context of the scheduled task, the mapped drive letter doesn't exist. &nbsp; I'd recommend that you switch from using a mapped drive letter (ie &nbsp;Z:) to the Universal Naming Convention (UNC) Name (ie. <a href="http://file://\\SomeServer\SomeShare" rel="ugc nofollow">\\SomeServer\SomeShare</a>)
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Most likely the issue is that you configured the backup task to use a mapped drive letter.... however, under the context of the scheduled task, the mapped drive letter doesn't exist.   I'd recommend that you switch from using a mapped drive letter (ie  Z:) to the Universal Naming Convention (UNC) Name (ie. \\SomeServer\SomeShare [http://file://\\SomeServer\SomeShare])

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The network share could not be accessed for the following reasons.<br />
No mapping between account names and security ID's was done. (0x80070534)<br />
Please ensure that the network locations is valid.
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The network share could not be accessed for the following reasons.
No mapping between account names and security ID's was done. (0x80070534)
Please ensure that the network locations is valid.

network backup

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

Network Analysis

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.