Cannot open critical backup ZIP file
Posted: Wed Oct 15, 2025 8:08 am
Hi everyone,
I’m new to the forum and I’m facing a serious issue with one of my backup files. I’m using FBackup version 9.9 and trying to access a ZIP file located on my external drive: E:\dailydata critical\1_d.zip
When I try to open it, Windows shows the following error: “Windows cannot open the folder. The compressed (zipped) folder is invalid.”
I read that ZIP files over 4GB might use ZIP64 format, so I reduced the data size to 2.474 GB, but I still get the same error.
What’s strange is that other backups with the same naming format (like x_d.zip) open just fine—even one that’s over 6 GB works without issues.
I don’t have any scheduled tasks on this computer, and this file contains critical data I must be able to restore if needed. I’ve tried everything I can think of, but no luck.
Has anyone experienced this or found a solution? Thanks in advance for your help!
I’m new to the forum and I’m facing a serious issue with one of my backup files. I’m using FBackup version 9.9 and trying to access a ZIP file located on my external drive: E:\dailydata critical\1_d.zip
When I try to open it, Windows shows the following error: “Windows cannot open the folder. The compressed (zipped) folder is invalid.”
I read that ZIP files over 4GB might use ZIP64 format, so I reduced the data size to 2.474 GB, but I still get the same error.
What’s strange is that other backups with the same naming format (like x_d.zip) open just fine—even one that’s over 6 GB works without issues.
I don’t have any scheduled tasks on this computer, and this file contains critical data I must be able to restore if needed. I’ve tried everything I can think of, but no luck.
Has anyone experienced this or found a solution? Thanks in advance for your help!