"primary storage" meaning in English

{
  "etymology_text": ": primary storage < → δείτε τις λέξεις primary και storage",
  "forms": [
    {
      "form": "primary storage"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Υλικό υπολογιστή (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "η κεντρική μνήμη"
      ],
      "id": "el-primary_storage-en-noun-Mra~d5lh",
      "raw_tags": [
        "υλικό υπολογιστή"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "internal memory"
    },
    {
      "word": "main memory"
    },
    {
      "word": "prime memory"
    },
    {
      "word": "system memory"
    }
  ],
  "word": "primary storage"
}

{
  "etymology_text": ": primary storage < → δείτε τις λέξεις primary και storage",
  "forms": [
    {
      "form": "primary storage"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Υλικό υπολογιστή (αγγλικά)"
      ],
      "glosses": [
        "η κεντρική μνήμη"
      ],
      "raw_tags": [
        "υλικό υπολογιστή"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "internal memory"
    },
    {
      "word": "main memory"
    },
    {
      "word": "prime memory"
    },
    {
      "word": "system memory"
    }
  ],
  "word": "primary storage"
}