TWRP not recognizing USB

Recovery for the Acer A500/A501

TWRP not recognizing USB

Postby bacu12 » 10 Apr 2016, 18:19

Hello, my Acer A500 isn't recognizing USB in twrp recovery. I formatted the drive in NTFS. Any Ideas?
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Re: TWRP not recognizing USB

Postby thor2002ro » 10 Apr 2016, 18:25

should work just fine I use it all the time... make sure that usb has only 1 partition the tablet will only try the first partition
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Re: TWRP not recognizing USB

Postby bacu12 » 10 Apr 2016, 18:38

The USB is a sandisk with micro USB and normal USB. I formatted it right after I purchased it. Its 16gb, on PC it only shows 14.5 total. Maybe another partition?
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Re: TWRP not recognizing USB

Postby freightyard » 10 Apr 2016, 19:47

no
it's just semantics
Here's some math from Marketing: the drive manufacturers even got sued for it but were allowed to continue listing a GB as 1000000000 bytes as long as they show in fine print on their packaging that actual storage will be less
1KB = 1000 bytes (10^3)
1MB = 1000000 bytes (10^6)
1GB = 1000000000 bytes (10^9)

Whereas a computer believes:
1KB = 1024 bytes (2^10)
1MB = 1048576 bytes (2^20)
1GB = 1073741824 bytes (2^30)

So if you take your 16GB on the packaging, convert it to 16 billion, then divide by 2^30, you get 14.90, which is what the system will report as the size. This is common with Flash drives, Hard disk drives, etc. ,Once you allow for the necessary space for the drive to index and store it's index info etc. and it's own operating system then you end up with 14.5 for a so called 16GB drive.
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Re: TWRP not recognizing USB

Postby bacu12 » 10 Apr 2016, 21:44

OK that means my thumb drive doesn't have any other partitions. So why would TWRP not even show it plugged in? its in NTFS format
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Re: TWRP not recognizing USB

Postby freightyard » 10 Apr 2016, 22:36

best bet if on windows is to format it with SDFormatter
It's free download and seems to work for everything solid state
and just format it as fat32 if you are only using it for storage on android
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