since upgrade to ubuntu 20.04.2 LTS I can't upload from camera. 'camera is locked by another device'

When you unplug the device do you use the safe remove function in the OS before physically unplugging it.

If you reboot the system without the device attached and log in, let the OS settle, connect the device then press CTRL +ALT h T and run:

dmesg | tail ; lsb_release -a ; uname -a; lsusb

What is the output, please?

Hi. Thanks Andrew for your help. No result from reboot and CTRL+ALT h T and run.
Below is result of : sudo apt install <deb name>

tom@YFelin:~$ dmesg |tail ; isb_release -a; lsub
[ 1314.028451] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1314.028453] usb 1-1.4: Product: RICOH WG-20
[ 1314.028455] usb 1-1.4: Manufacturer: RICOH IMAGING COMPANY, LTD.
[ 1314.028456] usb 1-1.4: SerialNumber: 000003301858
[ 1317.028233] usb 1-2: reset high-speed USB device number 3 using xhci_hcd
[ 1323.345201] audit: type=1400 audit(1624208598.805:63): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/gnome-initial-setup.desktop" pid=2570 comm="pool-org.gnome." requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 1323.456898] audit: type=1400 audit(1624208598.917:64): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/gnome-initial-setup.desktop" pid=2570 comm="pool-org.gnome." requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 1324.784479] audit: type=1326 audit(1624208600.245:65): auid=1000 uid=1000 gid=1000 ses=3 pid=2570 comm="pool-org.gnome." exe="/snap/snap-store/547/usr/bin/snap-store" sig=0 arch=c000003e syscall=93 compat=0 ip=0x7f8ab21514e7 code=0x50000
[ 1559.723053] usb 1-1.4: USB disconnect, device number 7
[ 1694.456891] audit: type=1326 audit(1624208969.924:66): auid=1000 uid=1000 gid=1000 ses=3 pid=3718 comm="snap-store" exe="/snap/snap-store/547/usr/bin/snap-store" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7f84bbe6c639 code=0x50000

Command 'isb_release' not found, did you mean:

  command 'lsb_release' from deb lsb-release (11.1.0ubuntu2)

Try: sudo apt install <deb name>

Command 'lsub' not found, did you mean:

  command 'lsusb' from deb usbutils (1:012-2)
  command 'qsub' from deb gridengine-client (8.1.9+dfsg-9build2)
  command 'qsub' from deb slurm-wlm-torque (19.05.5-1)

Try: sudo apt install <deb name>

tom@YFelin:~$
tom@YFelin:~$ sudo apt install <RICOH WG20>
bash: syntax error near unexpected token `newline'
tom@YFelin:~$

If you copy and paste the command I gave rather than attempt to retype it then you won't botch it. Copy and paste the entire line of commands I gave and paste it into the terminal and press ENTER

tom@YFelin:~$ dmesg | tail ; lsb_release -a ; uname -a; lsusb
[ 455.914864] audit: type=1400 audit(1624227671.070:63): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/gnome-initial-setup.desktop" pid=2497 comm="pool-org.gnome." requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 456.026036] audit: type=1400 audit(1624227671.178:64): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/gdm/greeter/applications/gnome-initial-setup.desktop" pid=2497 comm="pool-org.gnome." requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[ 457.281129] audit: type=1326 audit(1624227672.434:65): auid=1000 uid=1000 gid=1000 ses=4 pid=2497 comm="pool-org.gnome." exe="/snap/snap-store/547/usr/bin/snap-store" sig=0 arch=c000003e syscall=93 compat=0 ip=0x7f313e01b4e7 code=0x50000
[ 724.668943] usb 1-1.3: new high-speed USB device number 7 using xhci_hcd
[ 724.769811] usb 1-1.3: New USB device found, idVendor=25fb, idProduct=2007, bcdDevice= 1.00
[ 724.769829] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 724.769841] usb 1-1.3: Product: RICOH WG-20
[ 724.769852] usb 1-1.3: Manufacturer: RICOH IMAGING COMPANY, LTD.
[ 724.769861] usb 1-1.3: SerialNumber: 000003301858
[ 727.769707] usb 1-2: reset high-speed USB device number 3 using xhci_hcd
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
Linux YFelin 5.4.0-74-generic #83-Ubuntu SMP Sat May 8 02:35:39 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 0bda:0153 Realtek Semiconductor Corp. 3-in-1 (SD/SDHC/SDXC) Card Reader
Bus 001 Device 005: ID 04ca:007d Lite-On Technology Corp. USB wired keyboard
Bus 001 Device 003: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 001 Device 007: ID 25fb:2007 Liteon Technology Corp. USB wired keyboard
Bus 001 Device 004: ID 0461:4de3 Primax Electronics, Ltd HP 5-Button Optical Comfort Mouse
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
tom@YFelin:~$

Hi. Do you have any further comment or advice re my last feedback?

https://askubuntu.com/questions/1190661/shotwell-cant-access-camera
Unmount the camera on file explorer [usually right click and unmount] - Leave it physically connected.
Open Shotwell and click the camera icon - try uploading photos.