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If this guide helped you recover your data, consider documenting your process for future colleagues. And always, always keep backups of your large files (or at least their checksums) before performing any operations. Last updated: October 2025. For further assistance, consult the documentation for the specific tool that produced the "bigfile.000" file.
bigfile.000 bigfile.001 bigfile.002 ... bigfile.099 If any number is missing, the image is incomplete. In some tools, even a missing final segment (which might be smaller) will cause the first segment to fail to open because the tool pre-scans the chain. Unable To Open Bigfile Bigfile.000
Revert to original names. If original names unknown, use a hex editor to inspect the first few bytes of bigfile.000 —it may contain the original filename in its header. Step 4: Use the Correct Software The error message often appears when the software expects a specific format. For example: If this guide helped you recover your data,
| If your file is... | Use... | |-------------------|--------| | Raw split DD image ( bigfile.000 ) | FTK Imager, Autopsy, xmount , affuse , or losetup on Linux after concatenation | | EnCase segmented E01 ( bigfile.E01 ) | EnCase, FTK Imager, ewfacquire | | 7-Zip multi-volume ( bigfile.7z.000 ) | 7-Zip, PeaZip | | Segmented VMDK ( bigfile-s001.vmdk ) | VMware, VirtualBox, qemu-img | For further assistance, consult the documentation for the
If you are reading this, you have likely encountered this red text in your terminal, forensic tool (like FTK Imager, Autopsy, or X-Ways), or backup software. This article will dissect exactly what this error means, why it occurs, and—most importantly—how to fix it. Before diving into the error, it is crucial to understand the file you are trying to open.
Remember: the .000 extension is just a label. The real key is understanding how your image was created and respecting that structure. When in doubt, join the segments into a single file—this almost always resolves the error for raw split images.
Introduction There are few things more frustrating in digital forensics, data recovery, or large-scale system administration than encountering a cryptic error message that halts your progress. One such error that has caused headaches for professionals working with disk images, virtual machine exports, and forensic backups is:
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