Greetings
We are Team of Certified developer for Magento 2 with experiance of coding lot of Magento extensions , theme , 3rd party integration , stores etc
Please answer below question , so that we can fix all 3 issues for your shop
1. Index issues : this is not a issue , kindly share SSH we will resolve this
2. Backup on Remote FTP or google drive : Kindly share login we will take backup of shop
3. Security Issue :
Do you have SSL install for your domain ?
Please share url of your magento store & its version , we will share list of patches to install on your server
Kindly reply back to us soon , so we can discuss more & Share our MAGENTO PORTFOLIO
Thanks
Andrew
Note : Due to word Limitations we cant submit complete proposal here , KINDLY REPLY BACK ASAP for further details.