Error 0x80070002

I do an automatic system backup on my Windows 7 64 bit system. The external hard drive is a 250 gig Toshiba portable hard drive. There have been times in the past when I had to delete previous backups to free up disc space. As of last Sunday, when my scheduled backup happens, I get the 0x8007002 error code and the message that "The system cannot find the file specified". I did checks on the external drive and everything came back as OK. I have no idea what file is missing or any way to find out. I've run a Windows Update Troubleshooter to no avail. The backup is through the Backup and Restore found in the Control Panel.
I have a Western Digital Passport 2T external hard drive on its way to handle any size deficiencies, but, I'm worried that I will run into the same problem when I switch over to that drive. If the system is telling me the existing external drive is OK, then the problem is a corrupted or missing file and I'm clueless how to fix it. Thanks.

I'll look into those links. I really appreciate it.
Yesterday when the computer was doing its latest try at a backup, it got to about 59% when it gave me the error and message. At that point, I was sitting right at the desktop when its hard drive was making a clicking sound. I guess I don't know if it ran into a bad sector or if it was searching for a file and couldn't find it. As I said, I will be using a new external drive for the backup soon, but am fearful that the problem will persist. I did a check for errors on the desktop C-Drive (by selecting error check and restarting the computer), but it came back clean.

kodakjack said:

I'll look into those links. I really appreciate it.
Yesterday when the computer was doing its latest try at a backup, it got to about 59% when it gave me the error and message. At that point, I was sitting right at the desktop when its hard drive was making a clicking sound. I guess I don't know if it ran into a bad sector or if it was searching for a file and couldn't find it. As I said, I will be using a new external drive for the backup soon, but am fearful that the problem will persist. I did a check for errors on the desktop C-Drive (by selecting error check and restarting the computer), but it came back clean.

Crap! This has happened to me, and just recently. But the clicking stopped, and a full CHKDSK showed no errors. It was on my Windows XP Audio Workstation. I think when the system has been on for several days (I'll leave it on while I'm working on a project) the HDD controller goes buggy. It has not made any new clicks, but I have been shutting it off every other day since then. But you should run something like GWscan on that drive (you can't run it on a USB drive, it has to be mounted on IDE or SATA bus- But I have External SATA on both of my Desktops and also on my Dell Vostro laptop). A full surface scan on a 250gb drive should take roughly an hour, and if there is any Read element failure, it can block out some bad sectors. But sometimes, there are too many elements it can't deal with, and fails to complete- In that case I have had very good luck with a tool called ViVard. Both toolks are on Hiren's BCD, both are accessible from "Dos Programs - Hard Drive Utilities".

Snick said:

Why is my Hard Drive Clicking?
Test both your drives

Download and install SeaTools
Connect your external drive
Open SeaTools
Click on the checkbox of the drive you wish to testClick short drive self-test
If it passes, click long-generic
If it passes, do the same for the other drive.
If the drive fails any test, you need to backup the data on the drive and replace it.

GWscan (A Gateway computer Disk Repair Tool) can do the same repairs as Seatools can, GWscan is based upon the Western Digital WDDiag utility, but they did something to it to add Seagate Drive support, and a few other drive makers as well. It's worth a try. Otherwise, Seatools and WDDiag are both fine. Other Drivemakers have very proprietary utilities, like Hitachi, Samsung, etc. A well maintained HDD can last years and years.

Snick said:

Why is my Hard Drive Clicking?
Test both your drives

Download and install SeaTools
Connect your external drive
Open SeaTools
Click on the checkbox of the drive you wish to testClick short drive self-test
If it passes, click long-generic
If it passes, do the same for the other drive.
If the drive fails any test, you need to backup the data on the drive and replace it.

I did all of the tests on both the desktop's hard drive and the external hard drive. Both passed all of the tests suggested.
I'm grateful for a tool like that from Seagate, but in looking for the external drive I just bought, Seagate had very bad reviews. I got the Western Digital.
I stated the external drive I have is a Toshiba. It is actually a Hitachi. Do I have to use a Hitachi scan program or is the Seagate version OK?
I'll wait until Wednesday, the promise day for my Passport to be delivered. I'll try it and the AOMEI program and see what happens. Thanks.

Snick said:

One Seagate 3 TB drive had a plethora of failures. I've had mine for a few years, actually a month after when the 3 TB Seagate Backup Plus drives appeared on the market. Test on a schedule, no issues.

My opinion, pretty much any scan tool will run on another manufacturers drives, although some will swear by specific tool for specific drive.

Sounds about par for the course. I'll see what happens when the new Passport shows up and report back. The help is much appreciated.