CSV import and export
The Import/Export package adds separate Magento data transfer entities for customer category prices and customer-group category prices.
composer require mageb2b/pricesystem-categoryprice-importexport:*
php bin/magento setup:upgrade
php bin/magento cache:flush
Export each entity from System > Data Transfer > Export and use the resulting file as its template. Customer rows identify a customer; group rows identify a customer group. Both include the category, quantity, value, application type, optional base price, website, dates and priority.
Product and customer aliases can use human-readable identifiers such as SKU and email where the package configuration offers them.
Test one customer record and one group record before importing a full file. After import, verify a product in the selected category, the exact quantity threshold and a customer for whom both record types match.