diff --git a/BizHawk.Emulation.Cores/Computers/Commodore64/Cartridge/Mapper0020.cs b/BizHawk.Emulation.Cores/Computers/Commodore64/Cartridge/Mapper0020.cs
index b30912e856..32e30b0a73 100644
--- a/BizHawk.Emulation.Cores/Computers/Commodore64/Cartridge/Mapper0020.cs
+++ b/BizHawk.Emulation.Cores/Computers/Commodore64/Cartridge/Mapper0020.cs
@@ -309,8 +309,9 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.Cartridge
 
 		public override void SyncState(Serializer ser)
 		{
-			SaveState.SyncDelta("MediaStateA", ser, _originalMediaA, ref _banksA);
-			SaveState.SyncDelta("MediaStateB", ser, _originalMediaB, ref _banksB);
+			// feos: drop these 4MB of useful data from savestates until we learn why it's critical to store it
+			//SaveState.SyncDelta("MediaStateA", ser, _originalMediaA, ref _banksA);
+			//SaveState.SyncDelta("MediaStateB", ser, _originalMediaB, ref _banksB);
 			base.SyncState(ser);
 			DriveLightOn = _boardLed;
 		}
diff --git a/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/Drive1541.cs b/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/Drive1541.cs
index 3175544d76..9a73ca8868 100644
--- a/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/Drive1541.cs
+++ b/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/Drive1541.cs
@@ -100,7 +100,8 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.Serial
 			ser.Sync("SystemCpuClockNumerator", ref _cpuClockNum);
 			ser.Sync("SystemDriveCpuRatioDifference", ref _ratioDifference);
 			ser.Sync("DriveLightOffTime", ref _driveLightOffTime);
-			//ser.Sync("TrackImageData", ref _trackImageData, useNull: false); // feos: drop until we know why we save this 400KB thingy
+			// feos: drop until we know why we save this 400KB thingy
+			//ser.Sync("TrackImageData", ref _trackImageData, useNull: false);
 
 			ser.Sync("DiskDensityCounter", ref _diskDensityCounter);
 			ser.Sync("DiskSupplementaryCounter", ref _diskSupplementaryCounter);
diff --git a/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/SerialPort.cs b/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/SerialPort.cs
index 802d3faa37..95c36d9c9c 100644
--- a/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/SerialPort.cs
+++ b/BizHawk.Emulation.Cores/Computers/Commodore64/Serial/SerialPort.cs
@@ -56,7 +56,8 @@ namespace BizHawk.Emulation.Cores.Computers.Commodore64.Serial
 
 		public void SyncState(Serializer ser)
 		{
-			//_device?.SyncState(ser); // feos: this is already saved by DiskDrive.SyncState(ser);
+			// feos: this is already saved by DiskDrive.SyncState(ser);
+			//_device?.SyncState(ser);
 			ser.Sync("Connected", ref _connected);
 		}