Convert PSB to PSD

As far as we know, the only way how to convert PSB images to PSD format, would be to use Adobe Photoshop, because it is highly unlikely that some other, 3rd party software would be capable of psb to psd conversion. You might also need to resize the contents of .psb file and resize the canvas in Photoshop so the final file size is not greater than 2GB. This is because .psb files are typically created and automatically saved by Photoshop when the size exceeds the maximum Photoshop's limit for a .psd file.