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* Device file with <code>SubDirID = SubFileID = 00000000</code> doesn't exist. Other ID combinations can exists.
* Device file with <code>SubDirID = SubFileID = 00000000</code> doesn't exist. Other ID combinations can exists.
* Device file with <code>SubDirID = 00000000</code> and <code>SubFileID = 00000001</code> is the VSXE metadata file and must exist.
* Device file with <code>SubDirID = 00000000</code> and <code>SubFileID = 00000001</code> is the VSXE metadata file and must exist.
−* Other files, besides <code>Quota.dat</code> and <code>00000000/00000001</code>, are normal sub files, are these device files one-to-one correspond to virtual files.
+* Other files, besides <code>Quota.dat</code> and <code>00000000/00000001</code>, are normal sub files, are these device files one-to-one correspond to virtual files. They contain raw virtual file data in the DIFF inner content.
* <code>SubDirID = 00000000</code> is usually the only one device directory that can be seen. See [[#Device Directory Capacity]] for more information.
* <code>SubDirID = 00000000</code> is usually the only one device directory that can be seen. See [[#Device Directory Capacity]] for more information.