Ubuntu – Disk is likely to fail soon (37° C / 99° F)

Almost a fresh install of Ubuntu 3 days old. I never had a single problem with running Windows 10 on this laptop for the last 3 years. I don't know what happened.

What should I do to diagnose this?

I am completely new at using a Linux-based OS.
I have been using Windows for years. Now I mainly switched to Linux on my laptop for privacy issues, evading data collecting the most I can. I use a computer for video edition, webmastering and social medias. I have a chef brand.

When I want to import my data from a USB external HDD and/or SD card reader I get a Read error on swap-device error.

I don't really want to go back on Windows for explanation on top, but since I don't know commands and coding I need a little help here.

~$ free -h:

              total        used        free      shared  buff/cache   available
Mem:          7.6Gi       4.4Gi       274Mi       801Mi       2.9Gi       2.1Gi
Swap:         2.0Gi       118Mi       1.9Gi

~$ grep -i swap /etc/fstab:

/swapfile                                 none            swap    sw              0       0

~$ sudo blkid:

  asdasd/dev/sda2: UUID="04df9e3d-3c3c-4a1b-8177-961c7fa8dc41" TYPE="ext4" PARTUUID="0e9d6cbf-f602-4f5f-a6ff-cbf6a3f1cb47"
/dev/loop0: TYPE="squashfs"
/dev/loop1: TYPE="squashfs"
/dev/loop2: TYPE="squashfs"
/dev/loop3: TYPE="squashfs"
/dev/loop4: TYPE="squashfs"
/dev/loop5: TYPE="squashfs"
/dev/loop6: TYPE="squashfs"
/dev/loop7: TYPE="squashfs"
/dev/sda1: UUID="06C2-BFC1" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="8063f3cf-da82-4d74-81d1-1fbc716caef1"
/dev/loop8: TYPE="squashfs"
/dev/loop9: TYPE="squashfs"
/dev/loop10: TYPE="squashfs"
/dev/loop11: TYPE="squashfs"
/dev/loop12: TYPE="squashfs"
/dev/loop13: TYPE="squashfs"
/dev/loop14: TYPE="squashfs"
/dev/loop15: TYPE="squashfs"
/dev/loop16: TYPE="squashfs"
/dev/loop17: TYPE="squashfs"
/dev/loop18: TYPE="squashfs"
/dev/loop19: TYPE="squashfs"
/dev/loop20: TYPE="squashfs"
/dev/loop21: TYPE="squashfs"

Added picture: