Hmm. I guess need to double check the wiring, electrical tape if x tarik ketat2 can loose easy.
Even twisted cable if vibrate can terlepas.

Also, check back the wire that you spliced. Those if x twist ketat2 and betul2 can cause fault.

Goodluck.

For usb not detct, old system only detect fat32.

Btw u koneksyun using provided socket or u cut wayar and solder them togeder??

send back to lazada while you still have warranty.
then buy proper head unit. 

look like you mess up the wiring to ignition and wiring to battery, there should be 3 power wire , one is to chassis should be connect permanent to car metal body to get negative (-);  two Positive (+) 1. To ignition coil so when you turn key off radio is off. 2. To fuse, power direct from battery even your key pull out but your radio clock and memory still preserve because the power from this line are direct from battery.

Aku rasa ground tak betul. Aku punya pun kekadang cam tu. Finally when I got round to it, had to clean up the rust around the grounding. Baru ok.
NTFS tak boleh pakai kat situ. Format to FAT32.

try ground the (-) wire dont solder to the faktori koneksyun...and do some grounding la ur car...old car is good good to do grounding...dont buy those cheap fake hks/pivot/greddy/apexi/r3/trd grounding cable...u can diy using better wire la...bestest using 100% pure copper zero oxide cable...but ini my pendapat la...lain orang lain opinion...

Its your radio ground not the car's. I think la. It should be solidly grounded to a good point on the chassis. My Iswara punya is under the handbrake console