I still remember paying 40 euros like 16-17 years ago for the 512mb micro-sd card (it was called trans-flash at the time, don't know why) to put in my phone (lg u8360) and saying nothing to my parent because it was a crazy expensive thing at the time.

> it was called trans-flash at the time, don't know why

It was the original name, without the hyphen, though:

>> MicroSD form-factor memory cards were introduced in 2004 by SanDisk at CeBIT[16] and originally called T-Flash,[17] and later TransFlash,[18] which was abbreviated to "T-Flash" or "TF". T-Flash was renamed microSD in 2005 when it was adopted by the SDA.[19]