How to write DSK images to floppy disks?

Disks that are labeled 1DD should be avoided. Like Meits said, they are usually rejected 2DD disks where the magnetic material on the second side was rejected in quality control. That should make you distrust the main side as well. If you have single sided images, you can just put them on 2DD disks and only one side will be used. The Floppy Disk Image Tool I linked to in my previous comment is the only option I know that works with Windows 10, just use the /360 switch.

It could be that you need to format new disks before you can use them. During this process, the drive will write the physical tracks to the disk. Back in the days most brands would sell them pre-formatted, but some didn't. I don't know what the current situation is.

Ok, I will avoid 1DD disks.

Thanks! I will send you an email when I run out of 2DD disks.

I just ordered the last two boxes of brand new 2DD disks in a German store.

That's not good. Should be quite some faster than an MSX could do it.
Try again with another disk.

I don't seem to be able to pull this off properly. First I tried on my Windows PC using a USB floppy drive. Most of the times, it gives errors (and the fact that it's most of the times and not always, makes it even more puzzling). MSX Floppy Disk Manager says something like 'failed to lock device'. DSK Manager happily tells me the operation was carried out successfully without even accessing the floppy drive.

When Floppy Disk Manager does not give errors, more ofen than not the floppy disk gives errors in the MSX (and yes, I tried a lot of different floppy disks, but it can't be that they're all broken, can it?), which gives me the impression the process of writing the image to a floppy disk is not done very carefully. I haven't managed to write a disk image to a floppy with DSK Manager yet though. When opening an image, it shows the files on the disk, by the way, which makes me wonder if it can actually open and write disk images to a floppy in case there are no files (e.g. games like Dragon Slayer 6).

Then I tried on MSX with DSKPro. I copied DSKPro to a compact flash card which I accessed with the Sunrise CF ATA-IDE. I can run DSKPro without any problems, but can't find out how to select the .DSK file I want to write to disk and then write it to disk?

I am puzzled. It shouldn't be that hard to write a disk image to a floppy disk? Does anyone know what I am doing wrong?

I always used the simple tool putdisk.com to write disk images to floppy on MSX.