If you prefer accessing these on your phone, these apps allow for both reading and offline downloading: Marasiya Of Dawoodi Bohra - Apps on Google Play
includes a bookmarking feature to save specific Marasiya for quick access during Majlis or personal zikr. Search & Indexing
Physical manuscripts of old Bohra Marsiyas (written by poets like Mulla Jiwa and Mulla Abdul Husain) are decaying. Scanning them into PDF format is an act of digital preservation.