Make linux think usb flash drive is usb external hdd

I like the idea of linux treat all my usb storage, be it flash drive or not to be treated the same as usb external hardrive.

I just realize in dolphin , it has got "unmount" for external hardrive, and "safely remove" for external flash drive.
Somehow it just decided which device is which.
I want all my devices plugged into usb port to have "unmount" and "safely remove" (eject).

Why ? Because with unmount, the device is still listed in dolphin, i can mount it back without the need to unplug the usb and replug in.
I can do it in terminal to unmount, but if i can make dolphin or kernel to treat all usb devices the same, why not ?
It is very easy to configure, with just some register to be turned on.. but apparently i just don't know what keyword to search in google , hence can't find the result.

First, a USB thumb drive is an external hard drive.

You can enter it in your /etc/fstab. I do that with my permanently attached external USB drives, and, as they are permanently attached, I usually set the mount to "auto." I normally place the mount points in /media, rather than in /mnt.

For your thumb drive, you could set the mount to "noauto" and give the mount point an easy-to-remember name, then mount/unmount it from the command line.

Possibly you could add a udev rule to make all additional drives be treated the same way.
Or, maybe you should first investigate the journal to find out how exactly a plugged-in drive is treated.