Hi, if you are using Arch Linux for the first time and got in a problem where you can't access your partitions because your windows said so? well I am here to fix this issue, I will put down the steps that worked for me at least, so try your luck with these steps and hopefully you should be able to access your files

This issue works for people who stumble across this message on dolphin (KDE plasma's file explorer):

An error occurred while accessing 'Basic data partition', the system responded: The requested operation has failed: Error mounting (YOUR PARTITION) at (INSERT A DIRECTORY): wrong fs type, bad option, bad Superblock on (YOUR PARTITION), missing codepage or helper program, or other error

STEP 1 : BOOT TO WINDOWS

I assume you dual booted windows with linux and windows makes the partitions NTFS on default

1. Go to power options in control panel
2. Select "choose what the power button do" (you will see this option on the top left of the window)
3. click "change unavailable settings" (requires admin perms)
4. and uncheck "turn on fast boot (recommended)"

Now from what I understand, rather than windows hibernates on shutdown, it actually does proper shutdown.

This first step should ideally fix the problem but if the issue still exists, then there's a good chance that your partition or your drive is 'dirty' according to Linux, so in that case you need to boot up to windows again to clean your disk

STEP 2: CMD WITH ADMIN PERMS

I am unsure with this next step so only follow this step if this issue still exists: 1. Go to device manager 2. expand disk drives sections 3. right click on the hard drive where your partition is in 4. select properties 5. go to policies 6. and uncheck "write disk cache" (it should be the first option)

I need to warn you that I genuinely don't know what will happens in the long term but you should be doing fine while un-checking that option, ONLY FOLLOW THIS STEP IF YOU ARE OUT OF LUCK

This step is where it's safe to do but make sure you do it carefully so you don't screw things up

1. open your command prompt with admin perms
2. and use this command chkdsk (ur partition letter) /f /r /s (NOTE: this will take a very long time because windows will also check for any errors in that drive so make sure you have the spare time to do that)
3. once windows is done and finds no problems with your partition, Press restart instead of shut down
4. once you restart back to windows, you can normally shutdown and boot to linux

and try mounting your partition again using your default file explorer (whether dolphin, thunar, etc..)

and you should be able to have access to your partition now!

NONE OF THESE STEPS WORKS NOW WHAT DO I DO???

the only thing I can tell you is to mount your partition as a read-only and this is the easiest choice you can do instead

type lsblk -f and find the partition you want to mount (for example /dev/sda1 or nvme something), and type sudo mount (your partition directory) /mnt this will forcefully mount your partition under the condition to be read-only, and you can copy your files to linux to write them normally.

use these steps at your own risk, I do not hold the responsibility to any damage to your laptop/desktop lmfao.