Sony NW-WM1A Signature Series
128 GB
Sony NW-WM1A Signature Series
128 GB
No restriction so far, probably also the theoretical 2TB. I have been using a Samsung Evo Plus microSDXC UHS-I (256GB, Class 10) without any problems. This is full to the brim, I only use the external one on the WM1A - the internal memory is unused.
Samsung Evo Plus microSDXC UHS-I (256GB, Class 10)