Yes, it's MTP with my current phone and linux installation. Is there a problem with this? After I figured out where the filesystem was mounted (a bit of a pain), I could use it like a normal mount, as if it were an external USB drive.
First off, file access is mediated via software on the Android side. What you are seeing is a database representation of the device FS. And this database can be incorrect (people have in the past deleted folders they thought were empty only to lose files) or used to implement DRM.
> Yes, it's MTP with my current phone and linux installation. Is there a problem with this?
For the longest time MTP & Linux was terribly painful, verging on unusable, while mass storage worked perfectly. It bit when I upgraded my Nexus phone and discovered I couldn't get to the files stored on it.
The reason for implementing MTP instead of mass storage was clear, because you couldn't / wouldn't be able to access the files from the phone while the computer was accessing them. So I understand why they went in that direction.
But oh my goodness! MTP support on Linux was terrible for a while, and even on Windows it wasn't fast and reliable. It was easier at the time to just use a service like Dropbox to transfer files to/from the phone, than to use USB.