Kali Linux Persistence Error: No Solution on Internet

Hi Null Byte,
After going through numerous articles, forums and videos all over internet, i can not find any help on the subject .
Brief of problem: Trying to make kali linux persistent usb. Getting boot error in persistence mode.
Details: Following procedure was adopted to make persistent live usb

USB : Sandisk 30 GB Flash drive
OS : Windows 10 64-bit
Processor : Inetl(R) Core(TM) i5-2450M CPU @ 2.50GHz
Hardware : Dell Inspiron N5110
Kali iso image : kali-linux-kde-2019.3-amd64.iso

Step 1 : Formatted sandisk pen drive to FAT32(default) using windows
Step 2 : Used Kali site recommended iso burner balenaEthcher to burn iso image

Step 3 : Checked correct burning of image to pendrive . Booted persistence mode in through pendrive . It booted with no issues. Following is the output of fdisk -l

Output
root@kali:~# fdisk -l
Disk /dev/sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: ST500LM012 HN-M5
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x01dc99d4

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 206847 204800 100M de Dell Utility
/dev/sda2 * 206848 30926847 30720000 14.7G 7 HPFS/NTFS/exFAT
/dev/sda3 30926848 504447277 473520430 225.8G 7 HPFS/NTFS/exFAT
/dev/sda4 504451071 976771071 472320001 225.2G f W95 Ext'd (LBA)
/dev/sda5 504451072 767053823 262602752 125.2G 7 HPFS/NTFS/exFAT
/dev/sda6 767057920 976771071 209713152 100G 7 HPFS/NTFS/exFAT

Disk /dev/sdb: 30 GiB, 32212254720 bytes, 62914560 sectors
Disk model: Flash Disk
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x342f5226

Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 64 6619135 6619072 3.2G 17 Hidden HPFS/NTFS
/dev/sdb2 6619136 6620607 1472 736K 1 FAT12

Disk /dev/loop0: 2.89 GiB, 3079729152 bytes, 6015096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
root@kali:~#

Step 4 : Used MiniTool partition wizard to create persistence partition. Snapshots of procedure are as attached:

26.8 GB space was unallocated which was then formatted for ext4 as primary partition with label as persistence.

It was successfully completed.

Step 4: Booted with kali persistence mode and issued fdisk -l to check the disks
Output
root@kali:~# fdisk -l
Disk /dev/sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors
Disk model: ST500LM012 HN-M5
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x01dc99d4

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 206847 204800 100M de Dell Utility
/dev/sda2 * 206848 30926847 30720000 14.7G 7 HPFS/NTFS/exFAT
/dev/sda3 30926848 504447277 473520430 225.8G 7 HPFS/NTFS/exFAT
/dev/sda4 504451071 976771071 472320001 225.2G f W95 Ext'd (LBA)
/dev/sda5 504451072 767053823 262602752 125.2G 7 HPFS/NTFS/exFAT
/dev/sda6 767057920 976771071 209713152 100G 7 HPFS/NTFS/exFAT

Disk /dev/sdb: 30 GiB, 32212254720 bytes, 62914560 sectors
Disk model: Flash Disk
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x342f5226

Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 64 6619135 6619072 3.2G 17 Hidden HPFS/NTFS
/dev/sdb2 6619136 6620607 1472 736K 1 FAT12
/dev/sdb3 6621184 62912511 56291328 26.9G 83 Linux

Disk /dev/loop0: 2.89 GiB, 3079729152 bytes, 6015096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
root@kali:~#

Step 5: Issued following commands to make persistence
Output
root@kali:~# mkdir -p /mnt/my_usb
root@kali:~# mount /dev/sdb3 /mnt/my_usb
root@kali:~# echo "/ union" > /mnt/my_usb/persistence.conf
root@kali:~# umount /dev/sdb3
root@kali:~# reboot

Boot log file has following entries at this point
root@kali:~# cat /var/log/boot.log
done.
Begin: Mounting root file system ... Begin: Running /scripts/live-top ... done.
Begin: Running /scripts/live-premount ... done.
Begin: Running /scripts/live-realpremount ... done.

Begin: Mounting "/run/live/medium/live/filesystem.squashfs" on "/run/live/rootfs/filesystem.squashfs" via "/dev/loop0" ... done.

mount: mounting /dev/sda4 on /run/live/persistence/sda4 failed: No such device
mount: mounting /dev/sda on /run/live/persistence/sda failed: No such device
mount: mounting /dev/sdb on /run/live/persistence/sdb failed: Device or resource busy
mount: mounting /dev/sr0 on /run/live/persistence/sr0 failed: No such device
done.
Begin: Configuring fstab ... done.
Begin: Preconfiguring networking ... done.
Begin: Running /scripts/live-bottom ... done.
Begin: Running /scripts/init-bottom ... done.

Welcome to Kali GNU/Linux Rolling!

Step 6: To check the persistence, i created a file on desktop with command touch testfile and rebooted the system. However, this time it gave the following error. I can't write anything as the cursor is not available to type anything. Tried Ctrl+alt+F3 but no rescue.

I have tried different software to include power iso, rufus 3.11 , win32diskImager to see if it mitigates the error but it didn't help.

Also i have tried renaming the persistence drive in kali using the commands
*mkfs.ext3 -L persistence /dev/sdb3
e2label /dev/sdb3 persistence* in conjunction and singular and repeated the whole procedure but nothing worked .

I have checked numerous online forums and posts but didn't find any solutions. Request to help understand the reason of the error and how to mitigate it.

I am just starting the learning curve and after spending almost a week trying to figure out the solution , posting it here. Hoping to get help and guide.

Help out please!!!!!