I have one PCMCIA flash memory card that i'm trying to access from knoppix, but to no avail yet. It doesn't seem to mount it automatically. command "cardctl status" shows
Socket 0:
5 V 16-bit PC Card
function 0: [ready]
file /var/lib/pcmcia/stab has one line what says that
Socket 0: Memory Card
So i suppose that card is regogniced properly. But there is no icon at desktop to mount it. Under /dev/ there is listed hda1 (my hard drive) hdc (cdrom) and also hda, but no other files starting with hd. I created folder /media/card and tried to mount hda with command "mount -t msdos /dev/hda /media/card", but it fails with message "mount: /dev/hda already mounted or /media/card busy". I don't know if hda is my memory card or just some part of hard drive (i'm not so experienced linux user). And if it is not my memory card then i don't know what is.
It is also possible that memory card is broken. Under windows i can see names of files, but i can't access content of them. That is reason why i'm trying to access it in knoppix, i try to recover what is recoverable.

GIGABYTE A520M DS3H AC AMD AM4 Motherboard mATX
$59.99
Intel H310 LGA1151 8-9th Gen DDR4 M.2 NVMe mATX Motherboard IO Shield Battery
$54.99
GIGABYTE Z890M AORUS ELITE WIFI7 ICE INTEL MOTHERBOARD
$149.99
ASUS PRIME H410M-K LGA 1200 Intel 10th Gen H410 DDR4 USB3.2 Motherboard M-ATX
$59.99
GIGABYTE B365 HD3 LGA1151 Intel 9th Gen motherboard
$59.99
ASRock B550M PRO4 AM4 AMD B550 SATA 6Gb/s Micro ATX AMD Motherboard
$76.49
ASUS PRIME Z370-A II LGA 1151 Intel Z370 DDR4 DIMM USB3.1 DVI ATX RGB
$69.99
Intel H81 Motherboard M.2 NVMe LGA 1150 mATX w/ IO Shield (Random Slot Color)
$29.99
MSI MAG B550 TOMAHAWK MAX WIFI AM4 Motherboard
$108.95
GIGABYTE X870E AORUS ELITE X3D Motherboard New
$369.00