The file could not be saved Drupal

Question

uploading images from desktop is fine but the problem is when i need to upload image from mobile browser give me that error

• the file 14343254.jpg could not be saved . an unknown error has occurred
• the file in the Photo field was unable to be uploaded
• photo field is required

Answer 1

i finally solved my problem after 1 week of searching

The problem is i am using aws ec2 server with 8GB volume and its 70% filled so images from mobile camera is large its generate unknown error so when i increase my volume to 50GB the problem is solved