Hi guys! Unbelieavble , but I got my M3 to be live again

I almost stopped to believe , but it seems miracle can always happen

Well, I'd like to say thanks to all who dealed with my trouble. I know I can't tell all the names (as I would probably forget somebody), but anyway - U know to whom my my thanks is concerned

Of course, I feel necessity to tell U what I did (of course it doesn't mean it has to work for those who are in the same trouble as I was, but maybe my post wil help at least to some of them... So, here is my progress:
1) I did everything what the Hungarian guy Adikosa proposed - including renaming the file "SST39VF800.dfu" to "S5L8700 Rev.1". But there was always a problem that even if my computer found DFU device and I started downloading it disconnected me after a few moments. I believed that it was due to the value of a delay which is set in the INI file, so I increased the value. But always the same results. Then a guy from Jamaica with nickname Roryrudy wrote that even if this happens it is ok, if it happens (the disconnecting) during "downloading image 2" But my meizu was always disconnected before that when the image one was downloaded. So always no progress. But then I also read advice of the guy with a nickname wpyh. Again no progress - (which of course doesn not mean that his piece of advice cant help to someone - of course it can. Anyway all the procedures seemed to me more like some woodoo

))) so I wouldn't be surprised if my solution worked for somebody, another solution worked for somebody else) Ok, keep describing a technical procedure not my personal opinion: The thing is that I held M button and Power button simultaneously for many seconds before i connected it to usb (maybe 10 or more). Then I connected it and this time i was disconnected later then usual! (usually I also just pushed M button and Power button together and in the next second i conected it to USB) And what was the result? This time it disconnected me during "downloading image 2". So, having a memory of Jamaican guy I let it be for some time and then disconnected the cable... And? The Jamaican guy was damn right! If the dfu is disconnected during "downloading image 2" it should be ok...
well as I was not very technician above, here is my opinion of the situation. But please, take into the account that it is my own opinion and even if I am technicaly educated it doesn't mean it has to be right,ok? So,as I see it ,I think that
during pressing M button and power button some capacitors in the player are being charged from the battery. So the longer those 2 buttons are pressed simultaneously the bigger capacity the capacitor has (of course there is some maximum). And then when the dfu is connected to usb and the firmware upgrade starts the capacitor is discharged. Then it just depends when the capacitors are empty and the dfu is then disconnected from usb. If it happens during "downloading image 1" than KO

, if it happens during "downloading image 2" it is Ok...
well as i said it is just my own opinion , definitelly doesnt have to be correct! But I rather use this explanation than the woodoo anyway

Good luck to all of you who are or gonna be in the same trouble!
Tomas
Ps:Again big thanks to those 2 named guys above and also users wpyh, hx12