Samsung 1TB SSD on the USB of  the AX3000

using File Explorer (free trial) on iPhone 8

works fine for .txt and .rtf and .jpg - but .mov video files frequently lock up the app - just the spinning circle.

only option to regain control (found to-date...) is unplug the drive from the USB port.

potential causes

FTP limits/time out?

app bug?

router congestion?

is one disk format preferred with this hardware combination?

or . . . ???

the videos were taken with iPhone(s) - occassional error of "Cannot open file"

works with small files, and works with (some) big files, and locks up with middle size files . . . curious.

any background on the issue?

any suggestions for a rock solid iOS app?

tried FileBrowser - could not get past the UserID demand for my LAN; passwords I got, userids no got....

and may I suggest changing the "Reboot" option on the main screen to "Reset" . . .

had the idea perhaps cycling it off/on would clear the lock up on the USB but it resets the router to out of the box.