Use external hard drive without power supply - no hub either - to backup smartphone directly.
- Huawei Mate 20 Pro, this - I own this.
- USB C male to USB A (3.0) Adapter (i.e. OTG adapter), this - I own this.
- any of the following external hard drives:
I don't know the power output of my smartphone or the power requirements of those hard drives exactly and am therefore not sure if my goal is achievable. When I connect my LaCie 4TB to my phone - via said USB-C-A-Adapter or directly via a USB-C-cable - the drive is not recognised and doesn't seem to spin.
IV) Known information / How I am trying to solve my problem
I searched the web, but didn't find any official/trustworthy information from the manufacturers, from sellers or from users about the power in or output of either of those devices. The following information regarding the HDDs I found seems somewhat ambiguous:
WD = 1 watt (WD on Amazon, somewhat trustworthy, but only info about 3TB version, here).
LaCie = max. 2.9 watt (quite trustworthy actually, here).
My smartphone is able to supply an Apple Keyboard (wired) and an Apple Mighty Mouse (wired) at the same time over said OTG Adapter and a USB hub (hub power supply not plugged in!)... But I don't know the power consumption of those peripherals.
V) Main Questions
- A) Is my goal really achievable? How?
- B) Is my assumption right, that my LaCie HDD won't spin because of power supply issues?
- C) Will the mentioned WD HDD do the job? If no, other suggestions, please.
- D) How do I have to format my drives to be read by Android? (I've read ExFAT should work...)
VI) Additional, optional Questions
- E) What are the actual power requirements (in watt) of those drives? What is the actual power output of my Smartphone over OTG? Maybe someone with experience (and/or who has these drives) knows those numbers? Don't bother looking into the spec sheets of those drive, there is no information about the power requirements in there.
I know, these aren't questions directly regarding Android. But,
- first, there is no Stack Exchange Site about Smartphones,
- second, I was sent here by the people of the Electrical Engineering Stack Exchange Site after posting this very question there (and deleting it now),
- third, my smartphone is an android device,
- forth, this might be a Android-ExFAT format problem (?),
- and fifth, the Android community is really competent when it comes to tech questions,
so this is the right place for this, I think... Please don't hate on me for posting my questions here - I shall kindly migrate to another Stack Exchange forum if you know a more suitable one.
- Confirmed by Huawei support: The Mate 20 pro has 1 Ampere / 5 Volt output.
- Confirmed by LaCie support: Said LaCie Drive - and as it seems every thing hooked up via USB 3.0?! - needs 0.5 Ampere (no voltage info) to function properly. - So why doesen't this work? Too low voltage?