cat bigfile.bigfile000 bigfile.bigfile001 bigfile.bigfile002 > restored_original.bin
If you have tried all five solutions and you still see the error, your file might be permanently damaged. However, do not delete it. Search for a that specializes in: unable to open bigfile bigfile000 updated
Once you recover your data, follow these rules to never see the "unable to open bigfile bigfile000 updated" again: cat bigfile