  This paper presents an architecture, based on Distributed Ledger Technologies
(DLTs) and Decentralized File Storage (DFS) systems, to support the use of
Personal Information Management Systems (PIMS). DLT and DFS are used to manage
data sensed by mobile users equipped with devices with sensing capability. DLTs
guarantee the immutability, traceability and verifiability of references to
personal data, that are stored in DFS. In fact, the inclusion of data digests
in the DLT makes it possible to obtain an unalterable reference and a
tamper-proof log, while remaining compliant with the regulations on personal
data, i.e. GDPR. We provide an experimental evaluation on the feasibility of
the use of DFS. Three different scenarios have been studied: i) a proprietary
IPFS approach with a dedicated node interfacing with the data producers, ii) a
public IPFS service and iii) Sia Skynet. Results show that through proper
configuration of the system infrastructure, it is viable to build a
decentralized Personal Data Storage (PDS).
