No usable Device found for Barry Allen on DM900 UltraHD

Hello Mates I was getting the below error while trying to install BarryAllen on Dm 900 uhd running on Dreamelite 7.1 image . I can't ascertain possibly the cause .

hopefully one of our great minds here can help out. Thank in advance

Quote from master G

Quote from xyips32

No usable Device found for Barry Allen, sorry !

You need a device like SD card, USB Stick or HDD attached so Barry Allen can automount and complete the installation.

Do you have a device connected for multiboot and is it mounted properly?

@ master G I have mounted a usb stick , initialized it but still it won't install . may be it's from the Installed image.

Quote from master G

Quote from xyips32

initialized it but still it won't install

Don`t initialize it. Simply format the usb stick to FAT 32 in your laptop or PC, insert it into the DM900, reboot the DM900, then try to install Barry Allen again.

master G below was the new installation error after i did what you said.

Quote from master G

The image is missing 3 dependencies, tar, pigz and xz.

Install them in telnet.

apt-get update

apt-get install tar pigz xz

If all installed ok then try installing Barry Allen again.

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master G it's done . thanks a lot for your help.