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Greaseweazle V4.1 – USB Floppy Adapter for Emulators & Disk Imaging

Item number VAR8204
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Regular USB floppy drives can only read modern PC-formatted floppy disks and are not capable of handling older floppy disk formats used in classic home computers.

The Greaseweazle V4.1 is a specialized USB adapter that can read and write floppy disks with bit-precision at the flux level. This makes it ideal for archiving, data recovery, and emulator-compatible conversion of old floppy disks.

The adapter is compatible with Atari ST, Apple II, Amiga, Commodore 64 (C64), and MS-DOS floppy disk formats.


✅ Advantages:

Flux-level access: Bit-precise analysis, even in the presence of copy protection or errors.

Compatible with common floppy disk formats.

Supports many image formats: ADF, IMG, SCP, HFE, and others.

For 3.5" and 5.25" Shugart-compatible floppy drives

Compatible with Windows, macOS, and Linux

Open-source project (firmware & tools available for free)

Technical details:

Version: V4.1 (current hardware)

Connector: Micro-USB (incl. cable)

Floppy interface: 34-pin (standard Shugart)

Requires external floppy drive (not included)

Compact design without a case


⚠️ Note: Not a standard USB floppy drive – this device allows access to formats that are unreadable with conventional USB floppy drives. Basic knowledge of retro hardware or disk imaging is recommended.

  • Flux-level access: Bit-precise analysis, even in the presence of copy protection or errors. 
  • Compatible with common floppy disk formats. 
  • Supports many image formats: ADF, IMG, SCP, HFE, and others. 
  • For 3.5" and 5.25" Shugart-compatible floppy drives 
  • Compatible with Windows, macOS, and Linux 
  • Open-source project (firmware & tools available for free)