@Unappu If it works well for @RDFTKV think the driver for you particular SSD is maybe unoptimised and buggy…
its nothing that can be done with some SSD’s who aren’t compatible with the underlying linux kernel…
I would just suggest stopping here, and getting a more compatible SSD for you device,
I highly suggest the WD blue SSD, its quite affordable and a favorite among many in the Linux community for its low power consumption and wide compatibility…
hoping for the best,
cheers
Thanks for your help and sorry for the inconvenience. Thanks to you I learned a lot … 
I will always try to recommend Khadas products because of their quality, innovation, and most importantly because of the wonderful and active community 
It is no inconvenience. 
Have you checked with PNY to see if a firmware update exists for your SSD?
Also, re-seat the SSD. Check it carefully as the SSD needs to seat squarely in the M.2 connector and parallel(zero angle) to the Edge PCB. Misalignment may indue errors.
@Unappu According to the feedback of the experiment I asked you to do, there is no problem with your SSD on edge Android 9.0.
As for the problem that you can’t copy with other software, there may be two reasons as follows:
Xplore was granted memory permission from the start. Or maybe such a stupid question … why does total commager see this disk in two places, only one of which - the one above - works properly?
@Unappu You can try ES File Explorer or other file Explorer.
I have installed several file explorers. I have searched the internet and I see there is a problem with the write permission on this disk. The Android system is blocking writing to this disk. in linux it’s exactly the same. I cannot write data to this disk. only total cammenger, on Android, in one of two locations, it can easily create, copy, save even large files and directories on this disk
I gave back the old m2 disk. I have bought a new one according to your recommendations. WD Blue SN550 NVME. I learned to use fdisk, mkfs. My questions: what should be the partition table - msdos or gpt, exFat or better ext4, extended or primary partition? My own attempts have failed. Either android does not see the disk or shows disk error and is unable to format. Sorry for google translate
try using ext4, or msdos, its compatible with both linux and android…
ext4 is more preferable due to it having the ability to manage file permissions with linux
Partition extended or primary?
use it as primary partition
I created partitions, it worked but exFat. In Linux I can create directories on it, even copy large files. There are still problems in android … when I create an ext4 partition in Linux I cannot create new directories or copy files to it. The ext4 partition cannot be seen by android
did you not do it as root user ?
put sudo to avoid permission problems…
if it still doesn’t work,
I suggest asking @goenjoy and @hyphop for more help
@Unappu Please follow the command below：
1, On your Ubuntu system computer, do not insert SSD first, execute the following command:
hlm@Server:/$ cat /proc/partitions
major minor #blocks name
8 0 488386584 sda
8 1 104260375 sda1
8 2 596992 sda2
8 3 1 sda3
8 5 125829120 sda5
8 6 256695296 sda6
8 7 998400 sda7
hlm@Server:/$
2, On your Ubuntu system computer, insert SSD and execute the following command:
hlm@Server:/$ cat /proc/partitions
major minor #blocks name
8 0 488386584 sda
8 1 104260375 sda1
8 2 596992 sda2
8 3 1 sda3
8 5 125829120 sda5
8 6 256695296 sda6
8 7 998400 sda7
8 16 244198584 sdb
8 17 244196352 sdb1
hlm@Server:/$
3, Get your SSD mount path by comparing steps 1 and 2
4, Delete the original partition and create a primary partition of HPFS/NTFS/exFAT type
hlm@Server:/$ sudo fdisk /dev/sdb
Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sdb: 232.9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disklabel type: dos
Disk identifier: 0xdead8c42
Device Boot Start End Sectors Size Id Type
/dev/sdb1 63 488392064 488392002 232.9G 83 Linux
Command (m for help): d
Selected partition 1
Partition 1 has been deleted.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-488397167, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-488397167, default 488397167):
Created a new partition 1 of type 'Linux' and of size 232.9 GiB.
Command (m for help): t
Selected partition 1
Partition type (type L to list all types): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 84 OS/2 hidden or c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
...
Partition type (type L to list all types): 7
Changed type of partition 'Linux' to 'HPFS/NTFS/exFAT'.
Command (m for help): p
Disk /dev/sdb: 232.9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disklabel type: dos
Disk identifier: 0xdead8c42
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 488397167 488395120 232.9G 7 HPFS/NTFS/exFAT
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
5, Format primary partition
hlm@Server:/$ sudo mkfs.vfat /dev/sdb1
mkfs.fat 3.0.28 (2015-05-16)
hlm@Server:/$
I created NTFS partitions on Linux. everything is fine now. Android immediately saw the finished disk. Everything is ok. Thank you for your help and sorry for the Your time …
