Use your iriver as a drag-and-drop USB drive (MSC mode) — you don’t need Plus 4 for basic file transfers. Only use Plus 4 for firmware updates and video conversion.
While originally designed for Windows XP, Vista, and 7, many users run iriver Plus 4 on using these steps: Iriver Plus 4 Download Windows 10 38
(for 64-bit Windows 10):
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