So I have made up my mind to backup my current Windows 10 installation, I have made many tweaks to the current system and disabled many unnecessary services and installed all programs that needs to be installed and I have run many checks and tested it again and again, and I have determined it to be stable and fully functional, now I think this is a good time to make a full partition backup lest I somehow break it again, system restore doesn’t cut it anymore.
Which brings the question of how to best backup system partition, with a huge amount of files and all those access control lists, so I want to do it all right all the while make the backup file as small as possible.
Currently on my Samsung 870 QVO SSD, 603 GiB is available out of 931 GiB total, so that’s about 328 GiB used, I have a Seagate Exos 7E8 HDD and I am going to put this backup into a 3 TiB NTFS partition on the HDD, but I don’t want the backup to take up 328 GiB space, I want the backup file to have a compression ratio as high as possible, so as to save the maximum space possible.
Right now I am using another Windows 10 system I installed to another HDD, and I have tried to run this command:
dism /capture-image /imagefile:D:backupsWindows10.wim /capturedir:F: /name:Windows10 /compress:max
But it just keeps giving me this error:
Deployment Image Servicing and Management tool
The process cannot access the file because it is being used by another process.
The DISM log file can be found at C:WindowsLogsDISMdism.log
Do I have to run the above mentioned command inside a Windows Preinstallation Environment? I don’t really have any spare USB drive right now.
dism, the only other thing I know of that can get the job done is Norton Ghost, but that thing isn’t free and has become history now and I can’t find a copy of it now and I don’t want to.
So what other free options do I have that can backup a whole Windows 10 installation partition with ACLs and has a very high compression ratio?