Although it was amazing,it shouldon't be the memory that you grabed for such a long time

Although it was amazing,it shouldn't be the memory that you （ had ） grabed for such a long time
依据句子的意思 for such a long time 动作一直持续 应该用 完成时 时态为过去时

Although it was amazing,it shouldon't be the memory that you *had* grabed for such a long time

Although it was amazing,it shouldn't be the memory that you had grabed for such a long time

Although it was amazing,it shouldn't be the memory (which) you grabed for such a long time.

Although it was amazing,it shouldn't be the memory that you had grabed for such a long time