This plugin has helped me so much and has saved me a lot of work and I really appreciate what it does. I created some custom reusable blocks and saved them offline from the plugin as .json files, and wouldn't you know it - if I did not have those .json files and this plugin I'd be beating my head against the wall trying to recreate those blocks due to technical problems on our end. Very nice!
This plugin just made it to my MUST USE plugin list... All the advertised features work, but there is one more VERY important feature that I am not sure even the author realizes that this plugin does also.
Right now, through this plugin's screen, or if not using this plugin, in the native Gutenberg's reusable blocks screen, you can import and export ONE reusable block at a time. That said, if you activate this plugin, you will now have the option to export ALL reusable blocks with one click, which is very useful if you have dozens of reusable blocks. To export all of them in one file, go to Tools->Export, and you will get the option to export all your reusable blocks.
Everything that this plugin does, SHOULD be part of the WP core, no excuses, everything this plugin does, is extremely crucial.
Some history... The blocks export feature in the Tools->Export screen was available when running WP 4.9x, and using the Gutenberg plugin. The export option from the Tools screen disappeared when Gutenberg was merged in the core. In December 2018, I notified the developers on slack abut this, in their core channel, and I was swiftly told to report it in the Editor channel, which I did immediately. The answer I got there was that this function should be restored, but never did - 3-4 months later. This plugin brings back the ability to export all the reusable blocks with one click, in one file, so I can pack up all my blocks and save them as backup, or simply move them to another website.
Thanks for this great plugin,