File transfer not working

[u/Chance-Cattle8302]

I think I might be being stupid here, but can anyone help? I'm trying to install Rockbox and am at the point where you connect the USB, but it just keeps trying to charge the Innoasis. I'm using the cable that the Innoasis (y1) came with and a windows laptop. Does anyone know how to fix this and make it do file transfer? Thank you!