full adb backup not creating .ab file for Realme 2 Pro

I am unable to create a full phone backup file of my Realme 2 Pro (model RMX1801) through the ADB. The phone runs stock ColorOS 7 (Android 10). The device is not rooted and I do not want to root it. Doing that would delete my data. Also, my device hasn't had any screen-lock protection days before I ran the very first command (which is several hours amounting to few days before the original-revision of this post) and remaining wholly unchanged to the best of my knowledge till the timestamp of latest-revision. Here's what I've tried. I launched Command prompt (cmd.exe) and ran:

C:\Users\Dell> OneDrive\Desktop\adb.exe
C:\Users\Dell> adb devices
List of devices attached
86b3470 device

At this point I started to take backup. I have tried a couple of things and I'm categorizing them now. ##### Attempts when I entered no backup-encryption key whatsoever C:\Users\Dell>adb backup -all -f -nosystem C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab C:\Users\Dell>adb backup -all -f -nosystem -shared C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab Both of the commands showed on the UI that backup was taking place. But none of them created the backup file in my PC. ##### Attempts when I entered a backup-encryption key C:\Users\Dell>adb backup -all -f -nosystem C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab C:\Users\Dell>adb backup -all -f -nosystem -shared C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab No change, whatsoever. I also changed the destination path from OneDrive/Documents to OneDrive/Desktop and repeated all the above commands. That did not work either. ##### Attempts with double-quotes C:\Users\Dell>adb backup "-f -all -nosystem C:\Users\Dell\OneDrive\Desktop\RMX1801backup.ab" C:\Users\Dell>adb backup "-f -all -nosystem -shared C:\Users\Dell\OneDrive\Desktop\RMX1801backup.ab" Did not work. ##### Changed double quotes position C:\Users\Dell>adb backup "-f -all -nosystem" C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab C:\Users\Dell>adb backup "-f -all -shared -nosystem" C:\Users\Dell\OneDrive\Documents\RMX1801backup.ab C:\Users\Dell>adb backup -f "-all -nosystem -shared" C:\Users\Dell\OneDrive\Desktop\RMX1801backup.ab C:\Users\Dell>adb backup -f "-all -nosystem -shared" C:\Users\Dell\OneDrive\Desktop\RMX1801backup.ab Here's what happened in the case of double-quoted commands: All of the ones ending the double-quotes before the backup file's path appeared to have started the backup process but it did not create the backup file either. The duration of the backup process in the UI was also incredibly shorter, aka literally instantaneous, in these attempts. --- As asked in the comments, the versions of adb are produced below: C:\Users\Dell>adb version Android Debug Bridge version 1.0.41 Version 33.0.3-8952118 Installed as C:\Users\Dell\OneDrive\Desktop\platform-tools\adb.exe C:\Users\Dell>adb shell adbd --version * daemon not running; starting now at tcp:5037 * daemon started successfully /system/bin/sh: adbd: inaccessible or not found C:\Users\Dell>adb devices List of devices attached 86b3470 device C:\Users\Dell>adb shell RMX1801:/ $ adbd --version /system/bin/sh: adbd: inaccessible or not found 127|RMX1801:/ $ here are the [hitherto] unsolicited screencaps/screengrabs/screenshots: