<?xml version='1.0' encoding='utf-8'?>
<PRONOM-Report xmlns="http://pronom.nationalarchives.gov.uk">
  <report_format_detail>
    <FileFormat>
      <FormatID>2436</FormatID>
      <FormatName>exFAT (Extensible File Allocation Table) Disc Image</FormatName>
      <FormatVersion> </FormatVersion>
      <FormatAliases> </FormatAliases>
      <FormatFamilies> </FormatFamilies>
      <FormatTypes>Aggregate</FormatTypes>
      <FormatDisclosure> </FormatDisclosure>
      <FormatDescription>The Extensible File Allocation Table is a file system introduced by Microsoft in 2006, mainly for use in flash memory, such as USB flash drive and SD memory cards. It was a proprietary format until 2019, when Microsoft published its specification (https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification). It may be possible and desirable to distinguish between different types of exFAT image. Please contact the PRONOM team if you can assist with this.</FormatDescription>
      <BinaryFileFormat> </BinaryFileFormat>
      <ByteOrders> </ByteOrders>
      <ReleaseDate> </ReleaseDate>
      <WithdrawnDate> </WithdrawnDate>
      <ProvenanceSourceID>234</ProvenanceSourceID>
      <ProvenanceName>National Library of Australia / National Library of Australia</ProvenanceName>
      <ProvenanceSourceDate>25 Jan 2022</ProvenanceSourceDate>
      <ProvenanceDescription> </ProvenanceDescription>
      <LastUpdatedDate>25 Jan 2022</LastUpdatedDate>
      <FileFormatIdentifier>
        <Identifier>fmt/1609</Identifier>
        <IdentifierType>PUID</IdentifierType>
      </FileFormatIdentifier>
      <ExternalSignature>
        <ExternalSignatureID> </ExternalSignatureID>
        <Signature>img</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <InternalSignature>
        <SignatureID>1944</SignatureID>
        <SignatureName>exFAT (extensible File Allocation Table) disc image</SignatureName>
        <SignatureNote>BOF, offset 0, magic bytes: ëv.EXFAT000.</SignatureNote>
        <ByteSequence>
          <ByteSequenceID>1</ByteSequenceID>
          <PositionType>Absolute from BOF</PositionType>
          <Offset>0</Offset>
          <MaxOffset>0</MaxOffset>
          <IndirectOffsetLocation> </IndirectOffsetLocation>
          <IndirectOffsetLength> </IndirectOffsetLength>
          <Endianness> </Endianness>
          <ByteSequenceValue>EB7690455846415420202000</ByteSequenceValue>
        </ByteSequence>
      </InternalSignature>
      <RelatedFormat>
        <RelationshipType>Has priority over</RelationshipType>
        <RelatedFormatID>1895</RelatedFormatID>
        <RelatedFormatName>FAT Disk Image</RelatedFormatName>
        <RelatedFormatVersion> </RelatedFormatVersion>
      </RelatedFormat>
    </FileFormat>
  </report_format_detail>
</PRONOM-Report>