FILE_QUOTA_INFORMATION - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTIOAPI_H

typedef struct _FILE_QUOTA_INFORMATION
{
    ULONG NextEntryOffset;
    ULONG SidLength;
    LARGE_INTEGER ChangeTime;
    LARGE_INTEGER QuotaUsed;
    LARGE_INTEGER QuotaThreshold;
    LARGE_INTEGER QuotaLimit;
    _Field_size_bytes_(SidLength) SID Sid;
} FILE_QUOTA_INFORMATION, *PFILE_QUOTA_INFORMATION;

#endif

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This structure is documented in Windows Driver Kit.