diff --git a/SabreTools.Library/Data/Enums.cs b/SabreTools.Library/Data/Enums.cs
index ff3f857a..43dec0a9 100644
--- a/SabreTools.Library/Data/Enums.cs
+++ b/SabreTools.Library/Data/Enums.cs
@@ -96,13 +96,21 @@
 	{
 		None = 0,
 
+		// Bare types
+		CHD,
+		Folder,
+
 		// Archival types
 		SevenZipArchive,
-		CHD,
 		GZipArchive,
+		LRZipArchive,
+		LZ4Archive,
 		RarArchive,
-		TarArchive,
+		TapeArchive,
+		XZArchive,
 		ZipArchive,
+		ZPAQArchive,
+		ZstdArchive,
 	}
 
 	/// <summary>
diff --git a/SabreTools.Library/FileTypes/BaseArchive.cs b/SabreTools.Library/FileTypes/BaseArchive.cs
index f270a12d..e852bbf9 100644
--- a/SabreTools.Library/FileTypes/BaseArchive.cs
+++ b/SabreTools.Library/FileTypes/BaseArchive.cs
@@ -9,20 +9,16 @@ using System.IO;
 using MemoryStream = System.IO.MemoryStream;
 using Stream = System.IO.Stream;
 #endif
-using SharpCompress.Common;
 
 namespace SabreTools.Library.FileTypes
 {
-	public abstract class BaseArchive
+	public abstract class BaseArchive : BaseFile
 	{
 		#region Protected instance variables
 
 		// Buffer size used by archives
 		protected const int _bufferSize = 4096 * 128;
 
-		protected ArchiveType _archiveType;
-		protected string _filename;
-
 		#endregion
 
 		#region Construtors
@@ -39,8 +35,8 @@ namespace SabreTools.Library.FileTypes
 		/// </summary>
 		/// <param name="filename">Name of the file to use as an archive</param>
 		public BaseArchive(string filename)
+			: base(filename)
 		{
-			_filename = filename;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/BaseFile.cs b/SabreTools.Library/FileTypes/BaseFile.cs
new file mode 100644
index 00000000..072609ab
--- /dev/null
+++ b/SabreTools.Library/FileTypes/BaseFile.cs
@@ -0,0 +1,92 @@
+using System.Collections.Generic;
+
+using SabreTools.Library.Data;
+
+namespace SabreTools.Library.FileTypes
+{
+	public abstract class BaseFile
+	{
+		#region Protected instance variables
+
+		protected FileType _fileType;
+		protected string _filename;
+		protected List<BaseFile> _children;
+
+		// External hash values for the file
+		protected long? _size;
+		protected byte[] _crc;
+		protected byte[] _md5;
+		protected byte[] _sha1;
+		protected byte[] _sha256;
+		protected byte[] _sha384;
+		protected byte[] _sha512;
+
+		#endregion
+
+		#region Publicly facing variables
+
+		// TODO: Get all of these values automatically so there is no public "set"
+		public string Filename
+		{
+			get { return _filename; }
+			set { _filename = value; }
+		}
+		public long? Size
+		{
+			get { return _size; }
+			set { _size = value; }
+		}
+		public byte[] CRC
+		{
+			get { return _crc; }
+			set { _crc = value; }
+		}
+		public byte[] MD5
+		{
+			get { return _md5; }
+			set { _md5 = value; }
+		}
+		public byte[] SHA1
+		{
+			get { return _sha1; }
+			set { _sha1 = value; }
+		}
+		public byte[] SHA256
+		{
+			get { return _sha256; }
+			set { _sha256 = value; }
+		}
+		public byte[] SHA384
+		{
+			get { return _sha384; }
+			set { _sha384 = value; }
+		}
+		public byte[] SHA512
+		{
+			get { return _sha512; }
+			set { _sha512 = value; }
+		}
+
+		#endregion
+
+		#region Construtors
+
+		/// <summary>
+		/// Create a new Archive with no base file
+		/// </summary>
+		public BaseFile()
+		{
+		}
+
+		/// <summary>
+		/// Create a new Archive from the given file
+		/// </summary>
+		/// <param name="filename">Name of the file to use as an archive</param>
+		public BaseFile(string filename)
+		{
+			_filename = filename;
+		}
+
+		#endregion
+	}
+}
diff --git a/SabreTools.Library/FileTypes/CHDFile.cs b/SabreTools.Library/FileTypes/CHDFile.cs
index b423367f..d95cb821 100644
--- a/SabreTools.Library/FileTypes/CHDFile.cs
+++ b/SabreTools.Library/FileTypes/CHDFile.cs
@@ -88,7 +88,7 @@ namespace SabreTools.Library.FileTypes
 	/// 0x68-0x7b - Parent SHA-1
 	/// ----------------------------------------------
 	/// </remarks>
-	public class CHDFile : IDisposable
+	public class CHDFile : BaseFile, IDisposable
 	{
 		#region Private instance variables
 
@@ -122,6 +122,7 @@ namespace SabreTools.Library.FileTypes
 		/// <param name="chdstream">Stream representing the CHD file</param>
 		public CHDFile(Stream chdstream)
 		{
+			_fileType = FileType.CHD;
 			m_br = new BinaryReader(chdstream);
 		}
 
diff --git a/SabreTools.Library/FileTypes/CoreRarArchive.cs b/SabreTools.Library/FileTypes/CoreRarArchive.cs
index 69a5967a..d81d4931 100644
--- a/SabreTools.Library/FileTypes/CoreRarArchive.cs
+++ b/SabreTools.Library/FileTypes/CoreRarArchive.cs
@@ -1,7 +1,8 @@
 using System;
 using System.Collections.Generic;
-
+using System.IO;
 using SabreTools.Library.Data;
+using SabreTools.Library.DatItems;
 
 /// <summary>
 /// This code is based on the header format described at http://www.rarlab.com/technote.htm#srvheaders
@@ -116,7 +117,7 @@ using SabreTools.Library.Data;
 /// </remarks>
 namespace SabreTools.Library.FileTypes
 {
-	public class CoreRarArchive
+	public class CoreRarArchive : BaseArchive
 	{
 		// SFX Module Information
 		public byte[] SFX;
@@ -148,6 +149,55 @@ namespace SabreTools.Library.FileTypes
 
 		// Entry Information
 		public List<CoreRarArchiveEntry> Entries = new List<CoreRarArchiveEntry>();
+
+		#region Unimplemented methods
+
+		public override bool ExtractAll(string outDir)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override string ExtractEntry(string entryName, string outDir)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override (MemoryStream, string) ExtractEntryStream(string entryName)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override List<Rom> GetArchiveFileInfo(Hash omitFromScan = Hash.DeepHashes, bool date = false)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override List<string> GetEmptyFolders()
+		{
+			throw new NotImplementedException();
+		}
+
+		public override bool IsTorrent()
+		{
+			throw new NotImplementedException();
+		}
+
+		public override bool Write(string inputFile, string outDir, Rom rom, bool date = false, bool romba = false)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override bool Write(Stream inputStream, string outDir, Rom rom, bool date = false, bool romba = false)
+		{
+			throw new NotImplementedException();
+		}
+
+		public override bool Write(List<string> inputFiles, string outDir, List<Rom> roms, bool date = false, bool romba = false)
+		{
+			throw new NotImplementedException();
+		}
+
+		#endregion
 	}
 
 	public class CoreRarArchiveEntry
diff --git a/SabreTools.Library/FileTypes/Folder.cs b/SabreTools.Library/FileTypes/Folder.cs
index a2fbe6c7..69cde234 100644
--- a/SabreTools.Library/FileTypes/Folder.cs
+++ b/SabreTools.Library/FileTypes/Folder.cs
@@ -37,6 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public Folder()
 			: base()
 		{
+			_fileType = FileType.Folder;
 		}
 
 		/// <summary>
@@ -47,6 +48,7 @@ namespace SabreTools.Library.FileTypes
 		public Folder(string filename)
 			: base(filename)
 		{
+			_fileType = FileType.Folder;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/GZipArchive.cs b/SabreTools.Library/FileTypes/GZipArchive.cs
index f102dc0b..98ef07fa 100644
--- a/SabreTools.Library/FileTypes/GZipArchive.cs
+++ b/SabreTools.Library/FileTypes/GZipArchive.cs
@@ -21,7 +21,6 @@ using SeekOrigin = System.IO.SeekOrigin;
 using Stream = System.IO.Stream;
 #endif
 using Ionic.Zlib;
-using SharpCompress.Common;
 
 namespace SabreTools.Library.FileTypes
 {
@@ -38,6 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public GZipArchive()
 			: base()
 		{
+			_fileType = FileType.GZipArchive;
 		}
 
 		/// <summary>
@@ -48,7 +48,7 @@ namespace SabreTools.Library.FileTypes
 		public GZipArchive(string filename)
 			: base(filename)
 		{
-			_archiveType = ArchiveType.GZip;
+			_fileType = FileType.GZipArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/LRZipArchive.cs b/SabreTools.Library/FileTypes/LRZipArchive.cs
index 9cb46e0e..212f6c1b 100644
--- a/SabreTools.Library/FileTypes/LRZipArchive.cs
+++ b/SabreTools.Library/FileTypes/LRZipArchive.cs
@@ -27,6 +27,7 @@ namespace SabreTools.Library.FileTypes
 		public LRZipArchive()
 			: base()
 		{
+			_fileType = FileType.LRZipArchive;
 		}
 
 		/// <summary>
@@ -36,7 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public LRZipArchive(string filename)
 			: base(filename)
 		{
-			//_archiveType = ArchiveType.LRZip;
+			_fileType = FileType.LRZipArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/LZ4Archive.cs b/SabreTools.Library/FileTypes/LZ4Archive.cs
index 9ef909e3..bd20b142 100644
--- a/SabreTools.Library/FileTypes/LZ4Archive.cs
+++ b/SabreTools.Library/FileTypes/LZ4Archive.cs
@@ -27,6 +27,7 @@ namespace SabreTools.Library.FileTypes
 		public LZ4Archive()
 			: base()
 		{
+			_fileType = FileType.LZ4Archive;
 		}
 
 		/// <summary>
@@ -36,7 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public LZ4Archive(string filename)
 			: base(filename)
 		{
-			//_archiveType = ArchiveType.LRZip;
+			_fileType = FileType.LZ4Archive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/RarArchive.cs b/SabreTools.Library/FileTypes/RarArchive.cs
index 81451b26..e543f1f7 100644
--- a/SabreTools.Library/FileTypes/RarArchive.cs
+++ b/SabreTools.Library/FileTypes/RarArchive.cs
@@ -20,7 +20,6 @@ using Stream = System.IO.Stream;
 #endif
 using SharpCompress.Archives;
 using SharpCompress.Archives.Rar;
-using SharpCompress.Common;
 using SharpCompress.Readers;
 
 namespace SabreTools.Library.FileTypes
@@ -38,6 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public RarArchive()
 			: base()
 		{
+			_fileType = FileType.RarArchive;
 		}
 
 		/// <summary>
@@ -48,7 +48,7 @@ namespace SabreTools.Library.FileTypes
 		public RarArchive(string filename)
 			: base(filename)
 		{
-			_archiveType = ArchiveType.Rar;
+			_fileType = FileType.RarArchive;
 		}
 
 		#endregion
@@ -252,13 +252,13 @@ namespace SabreTools.Library.FileTypes
 			// Check for the signature first (Skipping the SFX Module)
 			byte[] signature = br.ReadBytes(8);
 			int startpos = 0;
-			while (startpos < Constants.MibiByte && BitConverter.ToString(signature, 0, 7) != Constants.RarSignature && BitConverter.ToString(signature) != Constants.RarFiveSig)
+			while (startpos < Constants.MibiByte && !signature.StartsWith(Constants.RarSignature, exact: true) && !signature.StartsWith(Constants.RarFiveSignature, exact: true))
 			{
 				startpos++;
 				br.BaseStream.Position = startpos;
 				signature = br.ReadBytes(8);
 			}
-			if (BitConverter.ToString(signature, 0, 7) != Constants.RarSignature && BitConverter.ToString(signature) != Constants.RarFiveSig)
+			if (!signature.StartsWith(Constants.RarSignature, exact: true) && !signature.StartsWith(Constants.RarFiveSignature, exact: true))
 			{
 				return;
 			}
diff --git a/SabreTools.Library/FileTypes/SevenZipArchive.cs b/SabreTools.Library/FileTypes/SevenZipArchive.cs
index 7ae2b907..9f577eac 100644
--- a/SabreTools.Library/FileTypes/SevenZipArchive.cs
+++ b/SabreTools.Library/FileTypes/SevenZipArchive.cs
@@ -22,7 +22,6 @@ using ROMVault2.SupportedFiles.Zip;
 using SevenZip; // TODO: Remove this when 7zip write is implemented in SharpCompress
 using SharpCompress.Archives;
 using SharpCompress.Archives.SevenZip;
-using SharpCompress.Common;
 using SharpCompress.Readers;
 
 namespace SabreTools.Library.FileTypes
@@ -41,6 +40,7 @@ namespace SabreTools.Library.FileTypes
 		public SevenZipArchive()
 			: base()
 		{
+			_fileType = FileType.SevenZipArchive;
 		}
 
 		/// <summary>
@@ -51,7 +51,7 @@ namespace SabreTools.Library.FileTypes
 		public SevenZipArchive(string filename)
 			: base(filename)
 		{
-			_archiveType = ArchiveType.SevenZip;
+			_fileType = FileType.SevenZipArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/TapeArchive.cs b/SabreTools.Library/FileTypes/TapeArchive.cs
index e6d25496..b2d90863 100644
--- a/SabreTools.Library/FileTypes/TapeArchive.cs
+++ b/SabreTools.Library/FileTypes/TapeArchive.cs
@@ -40,6 +40,7 @@ namespace SabreTools.Library.FileTypes
 		public TapeArchive()
 			: base()
 		{
+			_fileType = FileType.TapeArchive;
 		}
 
 		/// <summary>
@@ -50,7 +51,7 @@ namespace SabreTools.Library.FileTypes
 		public TapeArchive(string filename)
 			: base(filename)
 		{
-			_archiveType = ArchiveType.Tar;
+			_fileType = FileType.TapeArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/TorrentZipArchive.cs b/SabreTools.Library/FileTypes/TorrentZipArchive.cs
index 8aa6615f..340254b0 100644
--- a/SabreTools.Library/FileTypes/TorrentZipArchive.cs
+++ b/SabreTools.Library/FileTypes/TorrentZipArchive.cs
@@ -36,6 +36,7 @@ namespace SabreTools.Library.FileTypes
 		public TorrentZipArchive()
 			: base()
 		{
+			_fileType = FileType.ZipArchive;
 		}
 
 		/// <summary>
@@ -46,7 +47,7 @@ namespace SabreTools.Library.FileTypes
 		public TorrentZipArchive(string filename)
 			: base(filename)
 		{
-			_archiveType = ArchiveType.Zip;
+			_fileType = FileType.ZipArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/XZArchive.cs b/SabreTools.Library/FileTypes/XZArchive.cs
index f84ab620..90f85ce3 100644
--- a/SabreTools.Library/FileTypes/XZArchive.cs
+++ b/SabreTools.Library/FileTypes/XZArchive.cs
@@ -40,6 +40,7 @@ namespace SabreTools.Library.FileTypes
 		public XZArchive()
 			: base()
 		{
+			_fileType = FileType.XZArchive;
 		}
 
 		/// <summary>
@@ -50,7 +51,7 @@ namespace SabreTools.Library.FileTypes
 		public XZArchive(string filename)
 			: base(filename)
 		{
-			//_archiveType = ArchiveType.XZip;
+			_fileType = FileType.XZArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/ZPAQArchive.cs b/SabreTools.Library/FileTypes/ZPAQArchive.cs
index 487b520a..969dafda 100644
--- a/SabreTools.Library/FileTypes/ZPAQArchive.cs
+++ b/SabreTools.Library/FileTypes/ZPAQArchive.cs
@@ -27,6 +27,7 @@ namespace SabreTools.Library.FileTypes
 		public ZPAQArchive()
 			: base()
 		{
+			_fileType = FileType.ZPAQArchive;
 		}
 
 		/// <summary>
@@ -36,7 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public ZPAQArchive(string filename)
 			: base(filename)
 		{
-			//_archiveType = ArchiveType.LRZip;
+			_fileType = FileType.ZPAQArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/FileTypes/ZstdArchive.cs b/SabreTools.Library/FileTypes/ZstdArchive.cs
index ddae145a..3e861b35 100644
--- a/SabreTools.Library/FileTypes/ZstdArchive.cs
+++ b/SabreTools.Library/FileTypes/ZstdArchive.cs
@@ -27,6 +27,7 @@ namespace SabreTools.Library.FileTypes
 		public ZstdArchive()
 			: base()
 		{
+			_fileType = FileType.ZstdArchive;
 		}
 
 		/// <summary>
@@ -36,7 +37,7 @@ namespace SabreTools.Library.FileTypes
 		public ZstdArchive(string filename)
 			: base(filename)
 		{
-			//_archiveType = ArchiveType.LRZip;
+			_fileType = FileType.ZstdArchive;
 		}
 
 		#endregion
diff --git a/SabreTools.Library/SabreTools.Library.csproj b/SabreTools.Library/SabreTools.Library.csproj
index 035fe3aa..c9272f63 100644
--- a/SabreTools.Library/SabreTools.Library.csproj
+++ b/SabreTools.Library/SabreTools.Library.csproj
@@ -133,6 +133,7 @@
     <Compile Include="DatFiles\SoftwareList.cs" />
     <Compile Include="DatItems\Blank.cs" />
     <Compile Include="FileTypes\CHDFile.cs" />
+    <Compile Include="FileTypes\BaseFile.cs" />
     <Compile Include="FileTypes\CoreRarArchive.cs" />
     <Compile Include="External\NaturalSort\NaturalComparer.cs" />
     <Compile Include="External\NaturalSort\NaturalReversedComparer.cs" />
diff --git a/SabreTools.Library/Tools/Utilities.cs b/SabreTools.Library/Tools/Utilities.cs
index 5092b451..1e6d237b 100644
--- a/SabreTools.Library/Tools/Utilities.cs
+++ b/SabreTools.Library/Tools/Utilities.cs
@@ -466,13 +466,12 @@ namespace SabreTools.Library.Tools
 				case FileType.SevenZipArchive:
 					archive = new SevenZipArchive(input);
 					break;
-				case FileType.TarArchive:
+				case FileType.TapeArchive:
 					archive = new TapeArchive(input);
 					break;
 				case FileType.ZipArchive:
 					archive = new TorrentZipArchive(input);
 					break;
-				case FileType.CHD:
 				default:
 					// We ignore these types for now
 					break;
@@ -496,7 +495,7 @@ namespace SabreTools.Library.Tools
 					return new RarArchive();
 				case FileType.SevenZipArchive:
 					return new SevenZipArchive();
-				case FileType.TarArchive:
+				case FileType.TapeArchive:
 					return new TapeArchive();
 				case FileType.ZipArchive:
 					return new TorrentZipArchive();
@@ -1320,7 +1319,7 @@ namespace SabreTools.Library.Tools
 				}
 				else if (magic.StartsWith(Constants.TarSignature) || magic.StartsWith(Constants.TarZeroSignature))
 				{
-					outFileType = FileType.TarArchive;
+					outFileType = FileType.TapeArchive;
 				}
 				else if (magic.StartsWith(Constants.ZipSignature) || magic.StartsWith(Constants.ZipSignatureEmpty) || magic.StartsWith(Constants.ZipSignatureSpanned))
 				{
@@ -1350,12 +1349,7 @@ namespace SabreTools.Library.Tools
 
 			FileType? fileType = GetFileType(input);
 			switch (fileType)
-			{
-				case FileType.CHD:
-				case null:
-					shouldExternalProcess = true;
-					shouldInternalProcess = false;
-					break;
+			{				
 				case FileType.GZipArchive:
 					shouldExternalProcess = ((archiveScanLevel & ArchiveScanLevel.GZipExternal) != 0);
 					shouldInternalProcess = ((archiveScanLevel & ArchiveScanLevel.GZipInternal) != 0);
@@ -1372,6 +1366,11 @@ namespace SabreTools.Library.Tools
 					shouldExternalProcess = ((archiveScanLevel & ArchiveScanLevel.ZipExternal) != 0);
 					shouldInternalProcess = ((archiveScanLevel & ArchiveScanLevel.ZipInternal) != 0);
 					break;
+				case null:
+				default:
+					shouldExternalProcess = true;
+					shouldInternalProcess = false;
+					break;
 			}
 		}