Vox Putting pictures onto the gallery of the kobo vox

[VoxQuestion]

Hello

I have recently been trying to put pictures onto my Kobo Vox's gallery. The pictures are Jpeg. They are all to do with certain events so I have loaded them into septerate folders and put them onto the device. However once I put them into the gallery the pictures are no longer in order despite renaming them several times. Its annoying because if I am trying to show someone the pictures of an activity that were taken at a certain date they are all mixed up. I tried contacting customer support but they have failed to respond to me despite two emails.

I currently do not have acess to wireless internet for my vox so I would like to find a way to fix this if possible without having to download any apps.

If anyone can help I would greatly appreciate it.