If you can't buy recovery disks with Acer (the maker is always the first choice) try https://restore.solutions/en/aceraspirer3131t/
I've got no experience with them, but if not too expensive, it's worth a try.
I have an Acer Aspire R11 (R3-131T) which has 4GB RAM, 1.6GHz dual core Intel Celeron N3050 and a painful 32 GB eMMC drive. Recently, I tried installing a different OS on the computer, and wasn't successful. Obviously, I couldn't go back to the stock Windows 10, so I knew I had to reinstall it. So I tried making a bootable USB from a Mac using unetbootin and an ISO, but always crashed when copying the files. I also tried mounting the ISO to the computer, and copying the files to the USB (from Windows), which worked, and seemed to work perfectly until it decided to stop near the end of installing the features. I also tried using Rufus, but "didn't like" the ISO file. So I tried many other operating systems. I tried Windows 8.1, Windows 7, Remix OS, Elementary OS, Android x86, Mint Linux, even Windows Vista. Most of them booted, but didn't install. With Windows 7 and Vista, it said that it needed drivers for the hard drive, but I didn't know where to get them from, and thereafter, do with them. With Android, it worked perfectly, but every time it shut down, I had to find a way to get back into it with the USB, which became annoying. Elementary OS refused to install and Remix OS didn't boot at all (as well as Windows 8.1 and Mint Linux). I am waiting for Ubuntu to download so I can make a bootable USB, but I doubt that will work. Currently the laptop hasn't got an operating system on it. If you've made it this far: PLEASE HELP ME!!!! I have tried pretty much everything.