The backup cannot be started. Ensure that destination 'D:\' is accessible and try again.
Running Acronis True Image 2021 on 64 bit Win 10, version 21H2, backing up to a 5 TB My Passport external HD, connected via USB-C directly to the laptop & it has drive letter assigned to it.
Backups were working fine for a while, but then started going back to failing, with the message;
The backup cannot be started. Ensure that destination 'D:\' is accessible and try again.
The destination IS accessible
I can open it via the window with the big 'X' between my computer & the drive
I can open it via explorer & write files to it
WHY is this happening?
Would I have better luck with an external HD that has it's own power source?
Looking for suggestions before looking for another backup solution
Thanks -


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Has there been any change to the contents of the folder in which the backup goes? Perhaps it is trying to open one of the prior files in the chain and failing at that. Are you able to validate the backup task?
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No, it's pretty much used just for backups.
Not seeing where I can validate previous backups?
Win updates showed a driver update for external drive & I installed it, but when going back to properties, etc., it shows as MS driver from 2006. Going back to updates shows that driver no longer available, but same driver info before I looked for an update.
My SSD is 920GB full, but largest backup is not quite half of that. Should I delete & start over?
I also changed the setting on policies tab to better performance.
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Mike Post wrote:
Here?
Computer is always on & plugged in, too.
The setting is correct give the way you are using the PC. Over time, "generic" Microsoft drivers can be installed; try going to the PC vendors www site and download the latest USB driver for your PC. On desktops, there may be several drivers (sometimes they are included with the chipset drivers; check the user guide).
The problem I mentioned in my earlier post with my network card seems to have been solved by installing the driver from the motherboard manufacturer's www site.
Ian
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I think that your backup task has become confused about the location of your destination. See my post in the link below for my suggested solution.
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I removed the backup & when adding existing one, which of these do I pick & why are there so many of them?
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What happened to MIKE-WIN10-0002? Was there a cleanup plan which removed it? Why change in numbering on the latest (and why is it so small compared to the others)? I have no answers as I don't know what the backup task looks like.
Generally for lots of backup files within a single backup chain you can pick any of them. See what happens with the oldest, or newest (although I am suspicious of that oddly named one from 11/5).
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Mike,
I note that you have a beginning backup on date 8/16/2022 named Mike-Win10. There then appears to be two missing backups, Mike-Win10-0001 and Mike-Win10-0002 then, I see a normal backup of weekly tasks until 10/17/2022. After that point there is an 11 day period of no activity. What happened at this point?
The next backup on 10/28/2022 ran at 8:34 PM while all previous backups ran at or after 1:03 AM. What happened here? Did you manually run the task at this point?
I can tell that the task has become confused due to the top task name of Mike-Win10-1 indicating that the task is starting over.
What I recommend is that you select task name Mike-Win10-0010 of 10/17/2022 as your add back point. This should give the application the best chance at reconciling the metadata used to track the backups you have here. Once you do that and then reconfigure the task it should work for you.
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