diff --git a/src/com/webcodepro/applecommander/storage/DosFormatDisk.java b/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
index c05c9b1..c745d69 100644
--- a/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
+++ b/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
@@ -170,12 +170,23 @@ public class DosFormatDisk extends FormattedDisk {
 	}
 
 	/**
-	 * Identify if this disk format as not capable of having directories.
-	 * @see com.webcodepro.applecommander.storage.Disk#hasDirectories()
+	 * Identify if additional directories can be created.  This
+	 * may indicate that directories are not available to this
+	 * operating system or simply that the disk image is "locked"
+	 * to writing.
 	 */
-	public boolean canHaveDirectories() {
+	public boolean canCreateDirectories() {
 		return false;
 	}
+	
+	/**
+	 * Indicates if this disk image can create a file.
+	 * If not, the reason may be as simple as it has not beem implemented
+	 * to something specific about the disk.
+	 */
+	public boolean canCreateFile() {
+		return true;
+	}
 
 	/**
 	 * Compute the amount of freespace available on the disk.
@@ -361,10 +372,11 @@ public class DosFormatDisk extends FormattedDisk {
 	}
 	
 	/**
-	 * Indicates if this disk image can create a file.
+	 * Identify if this disk format as not capable of having directories.
+	 * @see com.webcodepro.applecommander.storage.Disk#hasDirectories()
 	 */
-	public boolean canCreateFile() {
-		return true;
+	public boolean canHaveDirectories() {
+		return false;
 	}
 	
 	/**
diff --git a/src/com/webcodepro/applecommander/storage/PascalFormatDisk.java b/src/com/webcodepro/applecommander/storage/PascalFormatDisk.java
index 2e5060b..4340c6a 100644
--- a/src/com/webcodepro/applecommander/storage/PascalFormatDisk.java
+++ b/src/com/webcodepro/applecommander/storage/PascalFormatDisk.java
@@ -154,8 +154,26 @@ public class PascalFormatDisk extends FormattedDisk {
 	 * Create a new FileEntry.
 	 */
 	public FileEntry createFile() throws DiskFullException {
-		// FIXME: Need to implement!
-		return null;
+		throw new DiskFullException("Unable to create files (yet).");
+	}
+
+	/**
+	 * Identify if additional directories can be created.  This
+	 * may indicate that directories are not available to this
+	 * operating system or simply that the disk image is "locked"
+	 * to writing.
+	 */
+	public boolean canCreateDirectories() {
+		return false;
+	}
+	
+	/**
+	 * Indicates if this disk image can create a file.
+	 * If not, the reason may be as simple as it has not beem implemented
+	 * to something specific about the disk.
+	 */
+	public boolean canCreateFile() {
+		return false;
 	}
 	
 	/**
@@ -389,13 +407,6 @@ public class PascalFormatDisk extends FormattedDisk {
 		return false;	// FIXME - not implemented
 	}
 	
-	/**
-	 * Indicates if this disk image can create a file.
-	 */
-	public boolean canCreateFile() {
-		return false;	// FIXME - not implemented
-	}
-	
 	/**
 	 * Indicates if this disk image can delete a file.
 	 */
diff --git a/src/com/webcodepro/applecommander/storage/RdosFormatDisk.java b/src/com/webcodepro/applecommander/storage/RdosFormatDisk.java
index 255ca61..8238ce8 100644
--- a/src/com/webcodepro/applecommander/storage/RdosFormatDisk.java
+++ b/src/com/webcodepro/applecommander/storage/RdosFormatDisk.java
@@ -164,13 +164,6 @@ public class RdosFormatDisk extends FormattedDisk {
 		writeSector(track, sector, data);
 	}
 
-	/**
-	 * RDOS dos not support directories.
-	 */
-	public boolean canHaveDirectories() {
-		return false;
-	}
-
 	/**
 	 * RDOS really does not have a disk name.  Fake one.
 	 */
@@ -202,8 +195,26 @@ public class RdosFormatDisk extends FormattedDisk {
 	 * Create a new FileEntry.
 	 */
 	public FileEntry createFile() throws DiskFullException {
-		// FIXME: Need to implement!
-		return null;
+		throw new DiskFullException("Cannot create a file (yet).");
+	}
+
+	/**
+	 * Identify if additional directories can be created.  This
+	 * may indicate that directories are not available to this
+	 * operating system or simply that the disk image is "locked"
+	 * to writing.
+	 */
+	public boolean canCreateDirectories() {
+		return false;
+	}
+	
+	/**
+	 * Indicates if this disk image can create a file.
+	 * If not, the reason may be as simple as it has not beem implemented
+	 * to something specific about the disk.
+	 */
+	public boolean canCreateFile() {
+		return false;		// FIXME - need to implement
 	}
 
 	/**
@@ -339,12 +350,12 @@ public class RdosFormatDisk extends FormattedDisk {
 	}
 	
 	/**
-	 * Indicates if this disk image can create a file.
+	 * RDOS dos not support directories.
 	 */
-	public boolean canCreateFile() {
-		return false;	// FIXME - not implemented
+	public boolean canHaveDirectories() {
+		return false;
 	}
-	
+
 	/**
 	 * Indicates if this disk image can delete a file.
 	 */