Convert mbm to psd Online: mbm2psd

You can use Tom's Editor to easily convert images from
Psion Series 5 Bitmap .MBM to Adobe Photoshop .PSD.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

MBM

Psion Series 5 Bitmap is an image format with extension MBM.

PSD

PSD is in internal image format of Adobe Photoshop. It can store all the features offered by Photoshop, like layers and paths. Images can be compressed or not.