Turns out it was the unit itself, I got a replacement and it worked right away. Z

ok based on this schematics https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf i have found the culprit. U8 chip leg 8 providing 3v3 volts to the board. this ic is blown. and if you check STATUS "ACT" LED or STATUS_LED_G in shematics you will se it needs 3v3 and comes from 3v3 line. since 3v3 is blown or low voltage it will not boot. check u11 pin5

Only Samsung and SanDisk work with zero issues for me.

Thanks @mitu, that'll get me started :D

The disk I plan on leaving attached. I'll look into options for mount; is option "nofail" supposed to mean that it will give up trying to mount if it is non-available? systemd-analyze blame the top four are nmbd.service 10.8s and hciuart.service 6.4s then raspi-config.service 1.3s and smbd.service 1s one is the net bios name server i was pretty sure I dont use that so i disabled it with sudo systemctl stop nmbd sudo systemctl disable nmbd I do use bluetooth, It seems like it is unusually slow. Reading dmesg: uart-pl011 3f201000.serial: no DMA platform data brcmfmac: power management disabled and brcmfmac: brcmf_c_preinit_dcmds; look like firmware warnings raspi-config is probably nominal, though I don't know what it is calling or doing at startup. I use samba smbd.service.

@adiif1 said in Pi3+ low speed sdcard?: Pi Model or other hardware: pi3+ A Power Supply used: Huawei charger 5v 4A Phone chargers do not supply enough stable current to power a Pi. You need to get a dedicated PSU designed for the Pi.

The same also applies for hard drives. You will never get what the actual size is quoted due to filesystem overheads and lose even more space depending what filesystem you format them to. Some take more space than others, some are very efficient filesystems, some are not

@mitu Certainly noted. I honestly never really drew a distinction between both sets of info. I just always assumed one was as good as the other. As I said, I'll definitely keep it in mind and use the pretty docs page for future reference.

@bulletbutter no, but you could copy the relevant config files/directories over, with much the same effect. it depends what kind of things you've configured.

@collcroc123 the systems don't appear in emulation station until you put ROMs the their folders Not sure why it's booting you to the command line...

thank you so much. i searched for like 2 hours for a solution before posting and that was super easy fix. again thanks a million

@Arie, @XboxWin That pop-up format message seems to be a new thing in the latest Windows 10 update. It's a bit annoying for me when every time I flash an image, I have to close it out.

@dankcushions Wow, super fast response. Thank you very much!! Patrick

@mitu oh, ok I’m sorry I’m all new to this.

@tmntturtlguy I have around 25-27gb on my 64gb so it should be fine. Thank you m8! I will take a look at rpi-clone! Cheers!

@RossiPosse Rather than removing it, it always helps to share your solution with others. To that end, the first menu option in the raspi-config will expand the filesystem on the SD card.

gotche. sorry about that

I tried to do the same actions, and then I tried to fix it by this tutorial but it didn't help me anyway. what else could you suggest? thanks

Thanks Gyperghost..