Ubuntu 20.04 crashes when it copies from a external disk large data

I don’t know what other information I can give you, but I know that this problem has been on Ubuntu for a long time (the Linux Mint that I have is based in the 16.04 environment). I hope that someone can solve this. If you need more information or tests in my computer I will be happy to help you.

More potentially useful data:

• The external Hard Disk is a Toshiba with 3.0 USB.

• My computer has a 3.0 Port and the average speed was 80.0 MB/s (it was quite good I think).

• The output with the sysctl vm.swappiness: vm.swappiness = 60

• The output of the free -h command:

              total        used        free      shared  buff/cache   available
Mem:           11Gi       3,3Gi       179Mi       598Mi       8,2Gi       7,5Gi
Swap:         3,9Gi        65Mi       3,8Gi

• My computer has two slots of RAM. My computer initially has just 4GB DDR3 but I bought another 8GB later. That’s why my systems works now with 11.6GB according to the data that Ubuntu gives me.

• The output of the inxi -Fxz command:

System:
  Kernel: 5.4.0-26-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Gnome 3.36.1 Distro: Ubuntu 20.04 LTS (Focal Fossa) 
Machine:
  Type: Laptop System: ASUSTeK product: X455LAB v: 1.0 serial: <filter> 
  Mobo: ASUSTeK model: X455LAB v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: X455LAB.208 date: 08/03/2015 
Battery:
  ID-1: BAT0 charge: 8.0 Wh condition: 21.4/37.3 Wh (57%) 
  model: ASUSTeK ASUS Battery status: Charging 
CPU:
  Topology: Dual Core model: Intel Core i7-5500U bits: 64 type: MT MCP 
  arch: Broadwell rev: 4 L2 cache: 4096 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 19156 
  Speed: 799 MHz min/max: 500/3000 MHz Core speeds (MHz): 1: 799 2: 798 
  3: 798 4: 798 
Graphics:
  Device-1: Intel HD Graphics 5500 vendor: ASUSTeK driver: i915 v: kernel 
  bus ID: 00:02.0 
  Display: x11 server: X.Org 1.20.8 driver: i915 resolution: 1366x768~60Hz 
  OpenGL: renderer: Mesa Intel HD Graphics 5500 (BDW GT2) v: 4.6 Mesa 20.0.4 
  direct render: Yes 
Audio:
  Device-1: Intel Broadwell-U Audio vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus ID: 00:03.0 
  Device-2: Intel Wildcat Point-LP High Definition Audio vendor: ASUSTeK 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
  Sound Server: ALSA v: k5.4.0-26-generic 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASUSTeK driver: r8169 v: kernel port: e000 bus ID: 02:00.0 
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Device-2: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter 
  vendor: Lite-On driver: ath9k v: kernel port: e000 bus ID: 03:00.0 
  IF: wlp3s0 state: up mac: <filter> 
  IF-ID-1: vmnet1 state: unknown speed: N/A duplex: N/A mac: <filter> 
  IF-ID-2: vmnet8 state: unknown speed: N/A duplex: N/A mac: <filter> 
Drives:
  Local Storage: total: 1.82 TiB used: 588.81 GiB (31.6%) 
  ID-1: /dev/sda vendor: Toshiba model: MQ01ABD100 size: 931.51 GiB 
  temp: 37 C 
  ID-2: /dev/sdb type: USB vendor: Toshiba model: MQ01UBD100 
  size: 931.51 GiB 
Partition:
  ID-1: / size: 274.01 GiB used: 38.01 GiB (13.9%) fs: ext4 dev: /dev/sda2 
  ID-2: swap-1 size: 3.91 GiB used: 70.4 MiB (1.8%) fs: swap dev: /dev/sda3 
Sensors:
  System Temperatures: cpu: 46.0 C mobo: 27.8 C 
  Fan Speeds (RPM): cpu: 2600 
Info:
  Processes: 306 Uptime: 20h 16m Memory: 11.61 GiB used: 3.13 GiB (27.0%) 
  Init: systemd runlevel: 5 Compilers: gcc: 9.3.0 Shell: bash v: 5.0.16 
  inxi: 3.0.38